2027 Chevy Corvette Grand Sport Tested: New 535-HP LS6 V-8 Proves GM Isn’t Done With Displacement

Quick Answer: The 2027 Chevrolet Corvette Grand Sport is back with an all-new, naturally aspirated 6.7-liter LS6 V-8 producing 535 horsepower and 520 lb-ft of torque, and instrumented testing shows it nearly matches the lighter Stingray at the strip while wearing the Z06’s wide-body stance.

Key Takeaways

• New 6.7L LS6 V-8: 535 hp / 520 lb-ft, 13.0:1 compression (highest ever in a Corvette)
• Grand Sport X hybrid AWD variant makes 721 hp combined, replaces the E-Ray
• Tested at 3.3 sec 0-60 and 11.4 sec quarter-mile at 119.3 mph
• Wears the wide Z06-style body with optional carbon-fiber aero and carbon-ceramic brakes
• Grand Sport arrives summer 2026, Grand Sport X follows in fall

Detroit: While most of the industry keeps shrinking displacement in favor of turbos and batteries, Chevrolet just went the other way. The Grand Sport nameplate returns to the C8 Corvette lineup for 2027, and it brings a genuinely new engine with it rather than a warmed-over version of the outgoing 6.2-liter LT2.

What’s New Under the Hood

The centerpiece is the LS6, a sixth-generation small-block displacing 6.7 liters — 409 cubic inches in old money, a nod to Chevy’s classic big-block era despite this being a pushrod small-block. It produces 535 hp at 6,100 rpm and 520 lb-ft at 4,600 rpm, gains of roughly 40 horses and 50 lb-ft over the hottest tune of the outgoing LT2, with both peaks arriving lower in the rev range.

A 13.0:1 compression ratio — the highest ever fitted to a production Corvette — plus new water-jacketed cylinder heads and a 95-mm throttle body feeding a tunnel-ram intake help the LS6 breathe better under load. The 6,500-rpm redline carries over from the Stingray, and power routes through an 8-speed dual-clutch transmission to the rear wheels only, with no supercharger or turbo involved.

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Chassis, Looks, and the Grand Sport X

Where the standard Stingray keeps its narrower body, the Grand Sport borrows the wide-body stance, larger tires, wider rear track, and Z06-derived braking hardware, along with an electronic limited-slip differential. Magnetic Ride Control is standard, and buyers can add a carbon-fiber aero package and carbon-ceramic brakes for track duty.

An available quad center-exit exhaust marks the first time a center-exit setup has been offered on a pushrod V-8 in this generation of Corvette. Sitting alongside the rear-wheel-drive Grand Sport is the new hybrid all-wheel-drive Grand Sport X, which replaces the outgoing E-Ray. It pairs the same 535-hp LS6 with a front-mounted electric motor adding 186 hp and 145 lb-ft, for a combined 721 horsepower and immediate off-the-line traction from the electric axle.

How It Performs at the Track

Instrumented testing puts the Grand Sport at 3.3 seconds to 60 mph and an 11.4-second quarter-mile at 119.3 mph — essentially identical to the lighter, less powerful Stingray’s 3.3-second/11.4-second/120.2-mph numbers, with the extra mass of the wide-body kit offsetting the Grand Sport’s slightly different setup. For reference, a 2023 Z06 ran a 3.2-second 0-60 and an 11.1-second quarter-mile, so the Grand Sport comfortably slots in as the more livable, naturally aspirated middle ground Chevy always intended it to be.

AutoAkhbar Verdict

Pricing rumors point to a starting figure just under $90,000 for the Grand Sport and around $100,000 for the Grand Sport X, undercutting rivals like the Porsche 911 and even a well-optioned BMW M4 Competition. For buyers who want big-displacement V-8 character without turbo lag or hybrid complexity, the Grand Sport looks like the sweet spot of the current Corvette range — exactly the role this nameplate has played in past generations.”

Source Name : Car and Driver

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