Chevrolet has unveiled the 2017 Corvette Grand Sport in Geneva overnight, which has posted near-ZR1 lap times during testing.
The Grand Sport is powered by the GM’s LT1 engine, taken from the Corvette Stingray. It is good for around 343kW, driving the rear wheels, and features the Stingray’s optional Z51 dry-sump lubrication system.
Michelin Pilot Super Sport rubber comes as standard, with optional Pilot Sport 2 Cup tyres, which combined with a new Z07 aero package, take lateral cornering g-forces from 1.05 to 1.2 g.
Stopping power comes thanks to a Brembo braking system with 355mm discs up front, and 340mm on the rear. The optional Z07 package ups the ante by adding carbon ceramic brakes.
The end result is a Corvette, which despite the lack of boosted power, has nearly matched the flagship ZR1 on GM’s Milford Proving Ground.
General Motors wanted to sharpen up the Grand Sport, but not make it prohibitively uncomfortable, so while the springs and stabiliser bars have been stiffened for more performance, the magnetic ride control system is still in place.
The Grand Sport is offered with two transmissions options, including a seven-speed manual as well as an eight-speed automatic.
It will land in US dealerships for their summer, while Europe will begin to take deliveries in their autumn.