Bentley director Woolf Barnato and Australian-born Bernard Rubin in a Bentley 4½ Litre gave the company back-to-back victories after a race-long duel with the Stutz of Édouard Brisson and Robert Bloch. In the process they won the inaugural prize for overall distance.
The big publicity from the previous year's race and the White House crash raised manufacturer interest and several British and American companies brought teams to the race. In fact foreign cars outnumbered French ones for the first time. The race started at a record pace, but after two of the Bentleys and the Ariès retired early, it became a one-on-one duel between the Bentley and the Stutz. They traded positions through the night and into the next morning. Going into the final hours the British car was suffering from water leaks and overheating, while the American car was losing its gears. Both teams drove as hard as they dared, and in the end the distance between the two was barely a lap, and both cars exceeded the previous record overall distance.
The CSI (Commission Sportive Internationale - the AIACR’s regulatory body) had issued new racing regulations. The Appendix C linked minimum dry-weights (i.e. without liquids, tyres and tools) to engine capacity. These included the following ranges:
In lieu of getting the entrants to drain their cars at scrutineering, the Automobile Club de l'Ouest (ACO) decreed that 15kg would cover the weight of fluids on cars over 3-litres and 10kg for those under. The required ‘passenger-ballast’ rule of 60kg per extra seat, after the driver's, was maintained and additional to those minimum weights.
But the main innovation from the ACO this year was the introduction of the Coupe à la Distance for the car that travelled the furthest over the twenty-four hours. Supercharged engines were now allowed (but not into the final round of the 1927-28 Biennial Cup), with their effective capacity regarded as 1.3 times their swept volume. The driving hood test, when cars had to run the first twenty laps with their hoods up, was discarded. However, all convertibles were still required to have a hood fitted, though stowed.
Once again, the ACO adjusted the Index target distances; although only by small margin. Example targets included the following:
|3000cc||129||129||92.8 km/h (57.7 mph)|
|2000cc||118||122||87.7 km/h (54.5 mph)|
|1500cc||107||111||79.8 km/h (49.6 mph)|
|1100cc||94||94||71.2 km/h (44.2 mph)|
The Hors Course rule was relaxed considerably this year – with cars now only disqualified for completing insufficient distance at the 12-hour mark and not every six hours as before. That distance now only had to be 80% of the target distance and not the previous 85%.
The track re-surfacing was completed along its whole length and reflectors were put on the corners for better awareness at night. Roadside picket fencing was put up at all the spectator access areas and the public address system now also covered all those areas.
After the previous year's short entry list, the ACO was gratified to have a far healthier entry list this year. No doubt motivated by the excitement of 1927, and a prize for an overall winner, there were more cars in the large-engine classes, although Ariès was still the only French manufacturer in that category. Indeed, foreign cars outnumbered French cars for the first time, including new entries from Lagonda, Alvis and Aston Martin from Great Britain, Alfa Romeo and Itala from Italy and Stutz from the USA. After the tough race the previous year, there were only six entries eligible for the 1927-28 Biennial Cup, with Salmson taking only one of its two available spots.
|Large-sized engines||11 / 9||over 2-litre|
|Medium-sized engines||18 / 15||1.1 to 2-litre|
|Small-sized engines||13 / 9||up to 1.1-litre|
|Total entrants||42 / 33|
- Note: The first number is the number of entries, the second the number who started.
Defending distance winners Bentley arrived with a four-car entry (one kept back for spare parts) and were strong favourites to win the inaugural distance prize. The cars were all 4½-litre tourers, two of them with racing chassis designed by Vanden Plas. The engine put out 130 bhp making them capable of a top speed of 165 kp/h (105 mph). Company director, and chief shareholder, Woolf Barnato drove with his wealthy Australian-born Grosvenor Square neighbour Bernard Rubin. They had the original 4½-litre (nicknamed “Old Mother Gun”) that had been mangled in the White House crash the previous year. The 1927 winner, Dudley Benjafield, was this time paired with 1924-winner Frank Clement. The third car was driven by another of the “Bentley Boys” debutantes, Sir Henry “Tim” Birkin, who was accompanied by the experienced Jean Chassagne, who had chased the team so hard in his Ariès the previous year.
Automobiles Ariès again returned with its streamlined 3-litre GP2 surbaissée “tank”. Although showing its age, the 3-litre engine had been tuned to now put out 96 bhp. It was driven by works drivers Robert Laly and Louis Rigal. As before the team also entered a pair of smaller 1.1-litre CC4 cars.
The biggest car in the field, by engine volume and stature was a Stutz BB Blackhawk. Its 5-litre engine produced 125 bhp and the car had been winning many races in the American AAA racing series. It was entered by Charles Terres Weymann, the Paris-based American car-distributor and aviator and driven by Le Mans veterans Édouard Brisson and Robert Bloch formerly of Lorraine-Dietrich.
After a promising debut in the 1925 race, Chrysler returned with a big four-car team, once again entered by its French distributor, the Grand Garage St Didier Paris. The “72” was the latest version of the same Chrysler Six but had a bigger 4.1-litre sidevalve engine that developed 85 bhp. The team hired a squad of grand-prix drivers: Henri Stoffel (1925 Chrysler driver) was with dual race-winner André Rossignol, up-and-coming race-winner Louis Chiron ran with Cyril de Vere, Conte “Freddie” Zehender was paired with Jacques Ledure while the Cantacuzino brothers (Parisian-resident Romanian aristocrats) had the fourth car.
Alfa Romeo had been vying with Bugatti for top Grand Prix honours in the mid-1920s. In sports-car racing they were also proving to be the team to beat with the fantastic new design from Vittorio Jano. The 6C-1500 Super Sport dominated Italian races, including winning the new Mille Miglia event. The supercharged 1.5-litre version only put out 75 bhp but gave a top speed of 140 kp/h (85 mph). The Russian émigrée Count Boris Ivanowski entered one for the race. However, the ACO scrutineers rejected it, saying it was “too racy” with too many standard components of a touring car removed to be eligible.
Itala’s best racing days were pre-war, but two cars came to Le Mans for the manufacturer’s only appearance. The Tipo 65 had a twin-cam 2-litre engine producing 70 bhp and capable of 130 kp/h (80 mph). Guy Benoist, winner of four Grand Prix in 1927 was partnered with former Chenard-Walcker driver Christian Dauvergne, while the two French nom-de-plumes “Sabipa” and “Christian” drove the other car.
Like Itala, the British Lagonda company had been racing since before the war. The new 2-litre Speed Model had been very successful in 1927. It had a top speed of almost 150 kp/h (95 mph) and three were entered. Managed by former Bentley driver Bertie Kensington-Moir, he had former other ex-Bentley drivers Baron André d’Erlanger, Douglas Hawkes and Clive Gallop alongside regular drivers Francis Samuelson and Frank King (also Lagonda sales-manager).
Alvis had also established itself in the British racing scene in the 1920s and was now concentrating on touring-car racing. The new FA12/50 model featured innovative front-wheel drive and could get up to 135 kp/h (85 mph) with its 1.5-litre 50 bhp engine. Two cars were entered for their racing debut, driven by Major Morris Harvey and George Purdy and Sammy Davis (race winner with Bentley) with Bill Urquhart-Dykes. However, only Harvey was really familiar with the different driving style of front-wheel drive.
Salmson was back with just a two-car team but looking to emulate their success in 1927 it was strong on paper. The Grand Sport had proven reliability and was entered in the Biennial Cup with 1927 winners, works drivers Georges Casse and André Rousseau. The team also entered the only supercharged car to get to the starting line. With the new rules permitting blown engines taking effect this year, they were ineligible for the ’27-28 Biennial Cup. The 1.1-litre engine with a Cozette supercharger was equivalent to a 1.43-litre engine and therefore had 20 more laps added to its target distance. It was driven by Jean Hasley / Albert Perrot.
After an acrimonious departure from Salmson in 1923, André Lombard was barred from competing for five years. In that time he founded his open company, Automobiles Lombard, making small voiturettes like Salmson. The first production model was the AL3, designed by Edmond Vareille (another ex-Salmson employee). Low-slung, the standard double-overhead-cam 1.1-litre engine had a 4-speed gearbox and had a top speed of 130 kp/h (80 mph). Lombard got ex-Salmson works driver Lucien Desvaux to drive. A second car arrived for Amilcar co-founder André Morel but did not practice.
A new challenger to Salmson for Index honours this year was Bollack Netter and Co (BNC). Founded in 1923, they started with small, quick cyclecars and then introducing models with bigger engines that proved competitive in racing. Three versions of their new Type H were offered (named after famous race-tracks), including the supercharged “Montlhéry” but it was a regular “Monza” model that was bought to Le Mans. This small 2-seater had a Ruby DS 1100 pushrod engine that put out 30 bhp and a three-speed gearbox. It was driven by regular works driver Michel Doré, along with Jean Treunet.
After a terrible 1927 race, Tracta returned with three of their front-wheel drive cars. Along with an improved Gephi, two new Type A models were entered, one with a 1.5-litre SCAP engine and the other with a 1.1-litre SCAP engine. Once again, team co-founder Jean-Albert Grégoire was driving, choosing the smaller Type A for the ‘27-28 Biennial Cup. Race veterans Maurice Benoist and Louis Balart ran the 1.5-litre car, while Roger Bourcier (injured in the road accident before the previous year’s race) drove the Gephi with the first South American at Le Mans: the Argentine Hector Vasena.
Aston Martin had had a difficult beginning, going through several bankruptcies since it was founded in 1913. The first design of the latest incarnation was the T-Type, which was to lead to the next model, the International. It was a four-seat convertible with a 1.5-litre engine and 4-speed gearbox. Two prototypes came to Le Mans, driven by engineer co-owner Augustus “Bert” Bertelli / George Eyston and Cyril Paul with former Bentley mechanic Jack Besant.
A number of teams found teething problems in the practice session. Fortunately, Morris Motors had purchased the Léon Bollée factory near Le Mans to produce cars for the French market. It routinely offered its facilities to foreign teams needing repair work and machining. This year, Alvis, Lagonda and Aston Martin availed themselves of that offer to get their cars race-ready. .
Just before the start of the race, a light squall came across the circuit. But it soon cleared and the weather was fine for the race. From the start the Bentleys were in front, with Birkin taking the lead, ahead of Brisson in the Stutz, Laly's Ariès the four Chryslers and two of the Lagondas. But not d’Erlanger, who had flooded his engine at the start and had been last away.
In the opening hour, the pace was torrid and the top four cars successively lowered the lap record. Brisson was able to keep up with the Bentleys but Barnato would not let him pass. It was only when the Stutz team protested the blocking tactics to the officials that Bentley signalled to Barnato to pull over. However, another short shower affected the Stutz's handling, letting Barnato pull away. Samuelson had been driving his Lagonda wildly. Ignoring team orders to slow down his luck ran out when he went off at Mulsanne corner and planted the car in the sandbank. He was reversing out when he was struck, ironically, by his teammate d’Erlanger, making up time after his delay at the start. The impact pushed Samuelson's car back through the sandbank and into the wooden fence beyond. It took him two hours to dig it out, whereupon he found the gearbox casing was cracked. Furious and bruised, d’Erlanger made it back to the pits where the front brakes and shock absorbers had to be disengaged to continue on.
Shortly before 7pm, the cars started coming in for their first fuel stops and driver changes. But on his due in-lap, Birkin did not arrive. Barnato reported to the team that he had seen Birkin marooned at Mulsanne corner with a puncture. The rubber had wrapped itself around the axle. After 90 minutes of cutting he got the tyre off and tried to drive back on the rim. He got as far as Arnage until the rim collapsed, pushing him off into the roadside ditch. Unable to move the car with just a single jack he ran the 5km back to the pits. Co-driver Chassagne smuggled a second jack out and ran back to take over the repair. He got going eventually but they had lost three hours in the process.
The Alvis team had planned on running 22-laps shifts but were concerned when their cars began sputtering on 19 laps because of their fuel-tank shape. They were both lucky to make it to the 20-lap minimum, forcing a change in the race-strategy. Bertelli had just taken over his Aston Martin when he had to take to the verge to overtake a slower car blocking him. But he hit a deep ditch wrecking his suspension.
Benjafield inherited the lead but it would not last long, as he fell back with an oil-leak in the engine, dropping him to fourth. This left Rubin and Bloch dicing for the lead. After a thrilling hour of close racing it was Bloch, in the Stutz, who was in the lead as night fell.
Bloch and Brisson kept the Stutz in the lead through the night. Barnato closed in again and Brisson repaid his earlier actions by himself blocking the road, even driving on the road-verge to throw stones up into the closely following Bentley. Later in the night the circuit had bouts of fog and light rain. The Benjafield/Clement Bentley was retired when a water pipe came loose emptying the water pump well before the 20-lap replenishment window. The cause was found to be because the chassis had flexed and broken from the strains of the hard racing.
The three Chryslers continued comfortably in the top-10, until around 3am when Chiron started having trouble with his clutch and fell back. The car was later disqualified when the drivers tried to bump-start the car. Davis had a big moment in the rain when a tyre blew on his Alvis accelerating out of Mulsanne corner. Missing the roadside trees, he managed to limp round to the pits to do the repairs. Having been on schedule as night fell, the supercharged Salmson developed engine problems that meant it was disqualified, alongside one of the SARAs, at the halfway point for insufficient distance. Just before dawn, Barnato and Rubin retook the lead off the Stutz as they stopped for fuel. The Chryslers were third and fourth. The Benoist/Dauvergne Itala, the first of the 2-litres, was close behind with the Alvis cars holding down sixth and seventh.
Through the morning the Stutz pursued the British team, but Rubin gradually built a lead. Then not long after midday the green Bentley had to pit with a water leak as the radiator worked loose, also due to a cracked chassis like their sister car. But then soon after the Stutz gearbox started giving trouble jumping out of top gear, and the Frenchmen could not keep up their pace.
At 10 am Benoist was trying to lap an Alvis at the Pontlieue hairpin when both tried outbraking each other. Both had to take the escape road. Benoist only got a hundred metres further when he came to a stop in the middle of the road, possibly with a locked brake. It took an hour for him to get back to the pits and get repairs. Another Alvis puncture dropped Urquhart-Dykes down the order. Then at 2.30pm Brisson came in with no top gear and the Stutz lost two laps in the pits.
Finish and post-race
In a tense finish, Barnato nursed the Bentley home with an emptying radiator and a rising temperature gauge. He was alarmed to see the Stutz team signal their car to speed up, but Bloch had his own issues with the fragile gearbox. Trying to time his run to the finish, Barnato arrived at the line a minute too early and had to do an extra lap. With water spattering him from the overheating radiator, he dropped to 50 km/h, free-wheeling down slopes and stopping to let the engine cool a bit. The Stutz overtook him, unlapping itself. In the end it took twenty minutes, and the winning margin over the Stutz was only 13 kilometres (8 miles). The pace of the two cars had been such that they easily broke the distance record, going seven laps further than Bloch and Rossignol had in the Lorraine-Dietrich in the 1926 race.
Two of the Chryslers came in third and fourth after trouble-free runs but were well back. The hard-charging Birkin/Chassagne Bentley had come back through the field to finish fifth. Birkin set a new lap record on his final lap, fully 39 seconds faster than the previous year, to just manage to meet their target of 135 laps. After their respective tribulations it was the Alvis of Harvey & Purdy who won the 1.5-litre class (coming in sixth), while the Benoist/Dauvergne Itala had dropped to 8th, but still had a 5-lap advantage over the last Lagonda running to win the 2-litre class. After the time lost from the Saturday night repairs, d’Erlanger/Hawkes had pushed on to finish 11th. 
Salmson repeated its previous year's success, coming in tenth overall and again winning the Biennial Cup, romping in and beating their target by 29 laps. However, they were beaten to this year's Index of Performance by the mighty little BNC that beat the same target by 33 laps, coming 7th overall and first French car home.
After a terrible race the previous year, Tracta had a complete reversal of fortune with all three of their cars finishing, the best being their 1.5-litre type A finishing 12th. Interestingly, all the cars of both front-wheel drive teams, Tracta and Alvis, finished the race. E.H.P. came away with their best result at Le Mans, finishing second in the Biennial Cup and beating their previous best distance by nine laps. However, the financial pressure of business downturn and the purchase of Bignan forced the company to close in 1929. The SARA of Duval/Mottet was the one nominated for the Biennial Cup. It was delayed through the middle of the race but they made up time to make their target by the slimmest of margins – calculated by the ACO as only 35 metres on its last lap. In contrast, SCAP lost both their cars in the last few hours, just short of their required distances. Despite launching a larger 2.3-litre car, within a year the company had closed.
After much success in the mid-1920s Salmson closed its racing team in 1929 on this high note, as the grand prix cars were getting outdated and the company was moving out of the crowded fast sports-car market. Unfortunately BNC had invested in larger passenger cars, which did not sell. Bollack and Natter were forced out of their own company at the end of the year when it was bought by businessman Charles de Ricou.
Results taken from Quentin Spurring's book, officially licensed by the ACO Although there were no official engine classes, the highest finishers in unofficial categories aligned with the Index targets are in Bold text.
|1||5.0||4||Bentley Motors Ltd|| Woolf Barnato
|Bentley 4½ Litre||Bentley 4.4L S4||D||135||155|
|2||5.0||1||Société de Carrosserie Weymann|| Robert Bloch
|Stutz Model BB Blackhawk||Stutz 4.9L S8||D||136||154|
|3||5.0||8||Grand Garage Saint-Didier Paris|| André Rossignol
|Chrysler Six Series 72||Chrysler 4.1L S6||D||134||144|
|4||5.0||7||Grand Garage Saint-Didier Paris|| Ionel Ghica-Cantacuzino
|Chrysler Six Series 72||Chrysler 4.1L S6||D||134||140|
|5||5.0||3||Bentley Motors Ltd|| Sir Henry “Tim” Birkin
|Bentley 4½ Litre||Bentley 4.4L S4||D||135||135|
|6||1.5||27||Alvis Car and Engineering Company|| Maj Maurice Harvey
|Alvis FA12/50||Alvis 1482cc S4||D||111||132|
|7||1.1||32||Bollack Netter et Cie|| Michel Doré
|BNC Type H Monza||Ruby 1099cc S4||D||99||132|
|8||2.0||12||Itala SA Fabbrica Automobili|| Robert Benoist
|Itala Tipo 65 S||Itala 1991cc S6||D||122||131|
|9||1.5||28||Alvis Car and Engineering Company|| Sammy Davis
|Alvis FA12/50||Alvis 1482cc S4||D||111||130|
|10||1.1||35||Société des Moteurs Salmson|| Georges Casse
|Salmson Grand Sport||Salmson 1095cc S4||D||99 [B]||128|
|11||2.0||16||Lagonda Motor Co.|| Baron André d'Erlanger
|Lagonda 2 Litre Speed Model||Lagonda 1954cc S4||D||121||126|
|12||1.5||29||SA des Automobiles Tracta|| Louis Balart
|Tracta Type A||S.C.A.P. 1481cc S4||D||111||119|
|13||1.1||37||Automobiles Lombard SA|| Lucien Desvaux
|Lombard AL3 Grand Air Sport||Lombard 1093cc S4||E||99||117|
|14||1.1||36||Établissements Henri Précloux|| Guy Bouriat
|E.H.P. Type DU||CIME 1094cc S6||D||99 [B]||116|
|15||2.0||19|| Société des Applications à
Refroidissements par Air
| Gaston Duval
|S.A.R.A. SP7||S.A.R.A. 1806cc S6||E||115 [B]||115|
|16||1.1||31||SA des Automobiles Tracta|| Roger Bourcier
|Tracta Gephi||S.C.A.P. 1099cc S4||BF||99||110|
|17||1.1||42||SA des Automobiles Tracta|| Jean-Albert Grégoire
|Tracta Type A||S.C.A.P. 1085cc S4||D||99 [B]||108|
Did Not Finish
|DNF||1.5||24|| Société des Construction
| Henri Guilbert
|S.C.A.P. Type O||SCAP 1495cc S8||D||111||95||Engine|
|DNF||1.1||39|| Société des Construction
| Lucien Lemesle
|S.C.A.P. Type M||SCAP 1087cc S4||D||99 [B]||91||Front axle|
|DNF||1.5||26||Aston Martin Ltd|| Jack Besant
|Aston Martin International||Aston Martin 1495cc S4||D||111||82||Gearbox|
|DNF||5.0||2||Bentley Motors Ltd|| Frank Clement
Dr Dudley Benjafield
|Bentley 4½ Litre||Bentley 4.4L S4||D||135 [B]||71||Radiator|
|DSQ||5.0||5||Grand Garage Saint-Didier Paris|| Louis Chiron
Cyril de Vere
|Chrysler Six Series 72||Chrysler 4.1L S6||D||134||66||Bump start|
|DNF||1.1||41||Société des Automobile Ariès|| Fernand Gabriel
|Ariès CC4||Ariès 1083cc S4||D||99||51||? (night)|
|DNF||2.0||14||Itala SA Fabbrica Automobili|| “Sabipa” (Louis Charavel)
|Itala Tipo 65 S||Itala 1991cc S6||D||122||50||Engine|
|DSQ||1.5||21|| Automobiles Luart-Poniatowski-
| Henri De Costier
Sosthene de la Rochefoucauld
|Alphi LM||CIME 1496cc S6||D||111||45||Broken panel|
|DNF||1.5||25||Aston Martin Ltd|| George Eyston
Augustus ‘Bert’ Bertelli
|Aston Martin International||Aston Martin 1495cc S4||D||111||32||Suspension|
|DSQ||1.5||30||Société des Moteurs Salmson|| Jean Hasley
|Salmson Grand Sport||Salmson 1095cc
|DSQ||2.0||20|| Société des Applications à
Refroidissements par Air
| Émile Maret
|S.A.R.A. SP7||S.A.R.A. 1806cc S6||E||115||25||Insufficient distance|
|DNF||2.0||18||Lagonda Motor Co.|| Capt Clive Gallop
Maj E.J. Hayes
|Lagonda 2 Litre Speed Model||Lagonda 1954cc S4||D||121||23||Radiator|
|DNF||1.1||40||Société des Automobile Ariès|| Arthur Duray
|Ariès CC4||Ariès 1083cc S4||D||99||22||? (evening)|
|DNF||2.0||15||Lagonda Motor Co.|| Capt Francis Samuelson
|Lagonda 2 Litre Speed Model||Lagonda 1954cc S4||D||121||13||Accident|
|DNF||5.0||6||Grand Garage Saint-Didier Paris|| Jacques Ledure
Conte Goffredo ‘Freddie’ Zehender
|Chrysler Six Series 72||Chrysler 4.1L S6||D||134||5||Radiator|
|DNF||3.0||9||Société des Automobile Ariès|| Robert Laly
|Ariès Type S GP2 Surbaisée||Ariès 3.0L S4||D||130||3||Engine|
- Note *: [B]= car also entered in the 1927-8 Biennial Cup.
- Note **: There were no official class divisions for this race. These are unofficial categories (used in subsequent years) related to the Index targets.
Did Not Start
|DNS||3.0||11|| Boris Ivanowski
| Boris Ivanowski
|Alfa Romeo 6C-1500
|Alfa Romeo 1487cc
|RES||2.0||17||Lagonda Motor Co.|| Bert Hammond
|Lagonda 2 Litre Speed Model||Lagonda 1954cc S4||Reserve entry|
|DNA||3.0||10||Société des Automobile Ariès||Ariès Type S GP3||Ariès 3.0L S4||Did not arrive|
|DNA||2.0||22||DMK Marendaz Ltd|| Capt Donald Marendaz
|Marendaz Special 11/55||Anzani 1496cc S4||Did not arrive|
|DNA||1.1||23|| Société des Construction
|S.C.A.P. Type O||SCAP 1495cc S8||Did not arrive|
|DNA||1.1||33||Cyclecars D’Yrsan|| . Simas
|D’Yrsan Grand Sport||Ruby 1097cc S4||Did not arrive|
|DNA||1.1||34||Cyclecars D’Yrsan|| Marquis Raymond Siran de Caranac
. de Soussay
|D’Yrsan Grand Sport||Ruby 1097cc S4||Did not arrive|
|DNA||1.1||38||Automobiles Lombard SA||Lombard AL3 Grand Air Sport||Lombard 1093cc S4||Withdrawn|
|DNA||750||43|| E. Gordon-England
|Austin 7||Austin 748cc S4||Did not arrive|
1927-28 Coupe Biennale Rudge-Whitworth
1928 Index of Performance (Prix Saint-Didier)
- Note: Only the top ten positions are included in this set of standings.
Highest Finisher in Class
|Class||Winning Car||Winning Drivers|
|5 to 8-litre||no entrants|
|3 to 5-litre||#4 Bentley 4½ Litre||Barnato / Rubin *|
|2 to 3-litre||no finishers|
|1500 to 2000cc||#12 Itala Tipo 65 S||Benoist / Dauvergne|
|1100 to 1500cc||#27 Alvis FA 12/50||Harvey / Purdy *|
|750 to 1100cc||#32 BNC type H Monza||Doré / Treunet *|
- Note *: setting a new class distance record.
- There were no official class divisions for this race and these are the highest finishers in unofficial categories (used in subsequent years) related to the Index targets.
- Fastest lap – H. Birkin, #3 Bentley 4½ Litre – 8:07secs; 127.60 km/h (79.29 mph)
- Winning distance – 2,669.27 km (1,658.61 mi)
- Winner's average speed – 111.22 km/h (69.11 mph)
- Clausager 1982, p.38-9
- Spurring 2015, p.245
- Clarke 1998, p.54: Motor Jun26 1928
- Spurring 2015, p.246-7
- Spurring 2015, p.269-71
- Fox 1973, p.53
- Spurring 2015, p.250-1
- Spurring 2015, p.256-8
- Spurring 2015, p.281
- Spurring 2015, p.265-6
- Spurring 2015, p.273-4
- Spurring 2015, p.260-3
- Spurring 2015, p.253-4
- Spurring 2015, p.53
- Spurring 2015, p.271-2
- Spurring 2015, p.254
- Spurring 2015, p.267-9
- Spurring 2015, p.278-80
- Spurring 2015, p.263-4
- Clarke 1998, p.48-9: Motor Jun19 1928
- Clarke 1998, p.50-1: Motor Jun19 1928
- Spurring 2015, p.244-5
- Spurring 2015, p.252-3
- Laban 2001, p.58
- Spurring 2015, p.248-50
- Clarke 1998, p.52-3: Motor Jun19 1928
- Spurring 2015, p.259
- Spurring 2015, p.277
- Spurring 2015, p.280-1
- Spurring 2015, p.2
- Spurring 2011, p.284
- "Le Mans 24 Hours 1928 - Racing Sports Cars". www.racingsportscars.com. Retrieved 26 October 2018.
- "Le Mans History". www.lemans-history.com. Retrieved 26 October 2018.
- "World Sports Racing Prototypes". www.wsrp.cz. Retrieved 26 October 2018.
- "Formula 2". www.formula2.net. Archived from the original on 5 July 2017. Retrieved 26 October 2018.
- Clarke, R.M. - editor (1998) Le Mans 'The Bentley & Alfa Years 1923–1939' Cobham, Surrey: Brooklands Books ISBN 1-85520-465-7
- Clausager, Anders (1982) Le Mans London: Arthur Barker Ltd ISBN 0-213-16846-4
- Fox, Charles (1973) The Great Racing Cars & Drivers London: Octopus Books Ltd ISBN 0-7064-0213-8
- Laban, Brian (2001) Le Mans 24 Hours London: Virgin Books ISBN 1-85227-971-0
- Spurring, Quentin (2015) Le Mans 1923-29 Yeovil, Somerset: Haynes Publishing ISBN 978-1-91050-508-3
- Racing Sports Cars – Le Mans 24 Hours 1928 entries, results, technical detail. Retrieved 26 Oct 2018
- Le Mans History – entries, results incl. photos, hourly positions. Retrieved 26 Oct 2018
- World Sports Racing Prototypes – results, reserve entries & chassis numbers. Retrieved 26 Oct 2018
- 24h en Piste – results, chassis numbers & hour-by-hour places (in French). Retrieved 26 Oct 2018
- Radio Le mans – Race article and review by Charles Dressing. Retrieved 2 Nov 2018
- Unique Cars & Parts – results & reserve entries. Retrieved 26 Oct 2018
- Formula 2 – Le Mans results & reserve entries. Retrieved 26 Oct 2018
- Motorsport Memorial – motor-racing deaths by year. Retrieved 26 Oct 2018