LEAKED: 2027 Chevy Corvette Grand Sport’s Engine Could Be Even Bigger Than We Thought

Ford may be catering to a wider variety of enthusiasts with its Raptor and Mustang lines, but Chevrolet‘s Corvette brand is filling every crevice of the sports car niche with the Stingray, the E-Ray, the Z06, the ZR1, and the ZR1X. According to recent reports, it’s about to squeeze even more juice out of the Corvette fruit with a new Grand Sport model, expected to have a big naturally aspirated V8, and this engine will be even larger than initially thought. Previously, a (now removed) video allegedly previewing the sound of the new model suggested that the Grand Sport would arrive with an engine designated as LS6, and this would be offered as either a 5.7-liter or 6.6-liter unit, but according to two reports from Corvette Blogger, the engine will be even mightier, displacing 6.7 liters.

Two Sources Claim LS6 Will Have 6.7-Liter Engine

The GM Parts Book was responsible for leaking the C8 ZR1’s LT7 engine code and some of its major specifications – direct injection, variable valve timing, active fuel management, dual overhead cams, and turbocharging – and now the same source (JMB56 on MidEngineCorvetteForum.com) has found a listing for a future RPO (regular production option code) that lists the sixth-gen LS6 as an eight-cylinder aluminum overhead valve gas engine with a 6.7-liter capacity and both direct injection and port fuel injection. This code was found under RPOs for the 2027 model year, which means the new Grand Sport will make its debut sometime in 2026. After this information was posted to the forum, Corvette Blogger passed the details onto “a person close to GM,” who reportedly confirmed the 6.7-liter displacement.

What to Expect from a New Corvette Grand Sport

The new engine appears to be part of GM’s investment in new engines, announced in May, and since GM promised more grunt from these new mills, it’s likely to produce more than 500 horsepower. If Chevy follows the same recipe as previous Grand Sport models, the body will be a little wider than that of a regular Stingray, which brings us to positioning. On the one hand, the LS6 could be used in the base Stingray in place of the 6.2-liter LT2 (495 hp). But on the other, would it make sense to invest in a new engine and then be constrained by the pricing of an “entry-level” sports car? Another possibility is that the Grand Sport will replace the hybrid E-Ray, which accounted for less than 2% of Corvette sales last year and isn’t showing strong resale values, but that would rob the lineup of an AWD variant. We think it makes sense for the new Grand Sport to sit somewhere between the Stingray ($70,000) and the E-Ray ($108,600), perhaps between $85,000 and $100,000. Whatever the case, this leak is the most definitive proof of a new Grand Sport yet, and we expect more and more info to trickle out of Detroit through the first half of 2026.