Why is the Skyline GT-R's RB26DETT exactly 2,568 cc?
Group A multiplied a turbo engine's displacement by 1.7 to set its class. About 2.35 litres would land the GT-R in the four-litre class, where the tyres were too narrow for a car with four-wheel drive. Hence 2,568 cc.
There are 89 more where that came from. Get Japanese Cars Trivia on Amazon → or
take the full entrance exam →