The ZR1X, by comparison, has a 5.5-liter twin-turbo V8 with a flat-plane crankshaft. Coupled with an electric drive unit, an eight-speed dual-clutch automatic, and AWD, it produces 1,250 hp combined.

All three of the C8 Corvette models that GM used in its recent Nürburgring lap record attempt were listed as prototype/pre-production models. Here's why.