Corvette Grand Sport Hits Track: 6.7L LS6 Acceleration

Corvette Grand Sport returns with a new 6.7L LS6 under the hood

Chevrolet's revived Corvette Grand Sport has just proven it's more than a styling exercise: the C8 Grand Sport fitted with the new naturally aspirated 6.7-liter LS6 delivered eye-catching on-track acceleration and handling numbers that will turn heads. This test car was a 3LT with carbon-fiber wheels and the Z52 track performance package, which adds carbon-ceramic brakes, more aggressive aero and ultra-sticky Michelin track tires.

What the LS6 brings

For 2027 the LS6 replaces the outgoing 6.2L LT2 across both Stingray and Grand Sport models. Output for the new naturally aspirated engine is rated at 535 hp and 705 Nm (520 lb-ft) of torque — roughly 40 hp and 55 Nm more than the LT2. Power is routed to the rear wheels via an eight-speed dual-clutch transmission, while the Grand Sport gets an exclusive shorter 5.56:1 final drive shared with the Z06. The Grand Sport also inherits the wider-body architecture from the higher-performance Corvette variants.

Acceleration and quarter-mile performance

On the timing lights the C8 Grand Sport recorded 0-60 mph (0-96 km/h) in 2.7 seconds. That makes it 0.1s quicker than the previous Stingray Z51 and just 0.1s behind the Z06. The quarter-mile benchmark came in at 11.0 seconds with a terminal speed of 198 km/h — a touch quicker than the fastest Stingray (11.2s) but still a step off the Z06's 10.5s trap speed.

Highlights:

• 0-96 km/h: 2.7 seconds
• Quarter mile: 11.0 seconds @ 198 km/h
• Engine: 6.7L naturally aspirated LS6, 535 hp / 705 Nm
• Transmission: 8-speed dual-clutch
• Final drive: 5.56:1 (Grand Sport exclusive)

Braking, handling and track dynamics

Corvette C8 has long been praised for exceptional brakes and chassis balance, and this Grand Sport continued that tradition. With the Z52 package and sticky track tires, the 1,672 kg Grand Sport stopped from 110 km/h in 43.9 meters and from 160 km/h in 87.1 meters. More impressive perhaps is the lateral grip: the car recorded a peak lateral acceleration of 1.18g — the strongest figure yet in the C8 family, edging past both Z06 and ZR1 test results.

On track the LS6 feels eager, with crisp throttle response and a broad torque band that makes the Grand Sport feel quicker through mid-range acceleration than its numbers alone suggest. The shorter final drive accentuates the car's launch and mid-range surge, while carbon-ceramic brakes provide progressive bite lap after lap.

How the Grand Sport fits the Corvette range

The Grand Sport sits between the standard Stingray and the hardcore Z06/ZR1 models, delivering a compelling blend of everyday usability and serious track capability. With the LS6 introduced as the next-generation small-block for General Motors, the Grand Sport also functions as a showcase for a powertrain that will spread across the lineup.

Quote:

• 'The Grand Sport is the sweetest spot for drivers who want Z06 edge without sacrificing Stingray usability.'

Whether buyers prioritize straight-line speed, lap times or a balanced sports car experience, the Grand Sport's new 6.7L LS6 makes a persuasive case. Further comparisons will be possible after an LS6-equipped Stingray hits the same test loop, but for now the Grand Sport reasserts Corvette's performance credentials and shows the LS6 is off to a strong start.