V5 engine designs are very uncommon, with the only production version of one being the 1997-2006 Volkswagen Group VR5 engine.
In the early 1980s, Oldsmobile developed a prototype 2.5 L (153 cu in) V5 diesel engine, however it never reached production stages and the project was subsequently abandoned. The engine is based on the Oldsmobile V6 diesel engine with the fuel injection pump in the location of the "missing" sixth cylinder. A prototype engine is on display at the RE Olds Museum in Lansing, Michigan.
The only V5 engine to reach production was the 2.3 L (140 cu in) "VR5" engine produced by Volkswagen from 1997–2006. Based on Volkswagen's VR6 engine, the VR5 was a narrow-angle engine with staggered cylinders (three cylinders on one bank and two on the other) sharing a single cylinder head. As per the VR6 engine, the angle between the banks was 15 degrees. Initial versions used 2 valves per cylinder, however, an update in 2000 resulted in a total of 4 valves per cylinder and the addition of variable valve timing.
The Honda RC211V, a MotoGP racing motorcycle which competed in the 2002–2006 seasons, used a V5 engine. The transversely-mounted 990 cc (60 cu in) engine had three cylinders at the front, two cylinders at the rear and a V-angle of 75.5 degrees. The engine used 4 valves per cylinder.
- "CC Weird Engines Outtake: Oldsmobile V5 Diesel–Grasping at Straws". www.curbsideclassic.com. Retrieved 17 June 2018.
- "Oldsmobile 2.5 Litre V5 Diesel". www.a350diesel.tripod.com. Retrieved 13 December 2019.
- Volkswagen Self-Study Programme. "The 2.3-ltr. V5 Engine - Design and Function" (PDF). www.volkspage.net. Archived from the original (PDF) on 8 May 2018.
- "Exclusive -- We Ride Honda's RC211V GP bike". www.motorcyclistonline.com. Retrieved 13 December 2019.