Rumors surrounding the C8 Corvette Z06 are fighting over the details of what exactly will power the mid-engine sports car.
Last week, a new report from Automobile Magazine said that the upcoming C8 Z06 Corvette would arrive with the twin-turbo Blackwing V8 engine courtesy of Cadillac. With 4.2-liters of displacement and around 800 horsepower, that seemed like a pretty decent power bump over the current C8's 495 horsepower.
However, since then two new reports have surfaced that refute some of the details handed to use from Automobile. The first comes from Motor Trend that says the Z06 will come with a twin-turbo V8, it won't be the Blackwing.
According to a "deep source on the Corvette team," both the C8 Z06 and C8.R racer "will be powered by a flat-plane-crank twin-turbo dual-overhead-cam V-8." As proof, the publication shows a pair of videos comparing the exhaust notes of the current C7.R and the C8.R test mule. The engines certainly sound different, with the C8.R's being higher pitched and more consistent than the C7.R.
Motor Trend also says that the Blackwing V8 will remain exclusive to Cadillac and instead Chevrolet will take the Blackwing and modify it. This tracks with their source as the Blackwing is currently a cross-plane-crank engine. Modifications will give it a flat-plane crank and also bore it out to be larger than 4.2-L, but likely won't be as large as 5.5-L as reported by Automobile.
A third report from Muscle Cars & Trucks says that this is all wrong and that the Z06 Corvette will actually retain a naturally-aspirated engine with around 600 horsepower. All this twin-turbo nonsense is actually describing the ZR1 'Vette, which we have no idea when it will arrive.
MC&T didn’t provide much to go on other than the Z06’s naturally-aspirated mill would have to beat the Ferrari 458’s 4.5-L. We’re not sure why as the Ferrari 458 has been out of production for several years and is, therefore, a strange benchmark to place against the more modern Corvette.
With everyone quoting credible sources, it’s hard to tell which one to believe. We’ll have to wait for Chevy to step forward to know for sure.