Chevrolet appears poised to expand the Corvette lineup further with a new Grand Sport model expected for the 2027 model year, and fresh details suggest it’ll pack an even larger V8 than previously believed.
A Bigger Engine Than Expected
According to recent reporting, the upcoming Grand Sport will use a sixth-generation LS6 engine displacing 6.7 liters. Earlier speculation had pointed to something in the 5.7-liter or 6.6-liter range, but newer information suggests the engine will be larger still, continuing Chevrolet’s push toward high-output naturally aspirated performance rather than turbocharging.
Where the Leak Came From
The leak traces back to the GM Parts Book, a source that’s previously revealed accurate details about future Corvette powertrains. The same person who identified the C8 ZR1’s LT7 engine code reportedly uncovered a new regular production option listing tied to the 2027 model year, describing the LS6 as an eight-cylinder aluminum overhead-valve gasoline engine featuring both direct injection and port fuel injection.
The code’s appearance under 2027 model year data suggests the new Grand Sport could actually debut sometime in 2026. That information was later corroborated by someone described as close to General Motors, adding extra weight to the 6.7-liter figure.
More Than 500 Horsepower Expected
The engine is believed to be part of General Motors’ broader investment in new internal combustion engines announced earlier this year. With GM signaling more output from these future powerplants, the new LS6 is expected to deliver more than 500 horsepower, putting it well above the current 6.2-liter LT2 used in the Stingray.
Where the Grand Sport Would Slot In
As with past Grand Sport models, the new version is expected to feature a wider body than the standard Stingray, helping bridge the gap between the base car and track-focused variants. Exactly where it lands in the lineup remains unclear — the LS6 could theoretically replace the LT2 in the Stingray, but the cost of developing an all-new engine may push it into a higher price bracket instead.
Another possibility is that the Grand Sport could take the place of the E-Ray, which accounted for only a small share of Corvette sales last year and has shown weaker resale performance. Pricing is expected to land somewhere between the Stingray and E-Ray, potentially in the $85,000 to $100,000 range.
Plenty of details remain unconfirmed, but the engine listing is the strongest evidence yet that a new Corvette Grand Sport is genuinely on the way, with more information expected to surface through early 2026.