When Chevrolet unveiled the new 2015 Corvette Z06 at NAIAS earlier this year they said the supercharged V8 engine in this car makes “at least” 625 horsepower. Turns out they were being modest. The car has now officially been rated at 650 horsepower (485 kW) and 650 lb-ft of torque (881 Nm).
The source of this awesome power is an LT4 force-fed 6.2 liter V8 equipped with a 1.7-liter Eaton supercharger and an enormous intercooler. It features aluminum cylinder heads and steel connecting rods for reduced reciprocating mass, and forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures.
It is a piece of engineering marvel, this engine, and Chevy does not shy away from boasting how it is better than what you get in cars like the Ferrari F12 and Porsche 911 Turbo S, both of which cost considerably more than the 2015 Corvette Z06. The LT4 develops more torque than the F12’s V12 engine, and humiliates the Turbo S by a margin of 90 horsepower and 134 lb-ft of torque.
This is of course great news for Corvette fans, but it also means that Chevy may not bother developing a new Z01. I mean how are they going to improve on this?
“The LT4 Small Block sets a new benchmark for power and torque at GM,” said Steve Kiefer, vice president, GM Powertrain Engineering. “The engine also puts the new Corvette Z06 on par with the most powerful supercars offered in America, while delivering performance with impeccable manners that make it suitable for daily driving.”