Essentially a racing engine in a road car, this ultimate iteration of the legendary Chevy small-block
V-8--born 50 years ago in modest 265 cid, 162 (gross) hp form--is hand-built at GM Powertrain's new Performance Build Center in Wixom, Mich.
It comes with a monster 420hp, 550Nm 6.0- litre Corvette-based small-block
V8 under the bonnet, offering astonishing performance (0-100km/h in 4.9 seconds) and with four doors and a big boot it's practical too.
To claim that GM's small-block
engine has earned a place in history would be an understatement.
Powertrain is a new LS2 version of GM's Gen IV small-block
V-8 delivering a best-ever 400 horses coupled to a choice of smooth, precise Tremec 6-speed manual or upgraded 4L65-E 4-speed Hydra-Matic with perfection-seeking Performance Algorithm Shifting.
Auto Business News-October 5, 2015--Chevrolet to launch ZZ6 small-block
V8 engine at 2015 SEMA show
GM needs to get rid of the aged four-speed automatic quickly, while the small-block
V-8 also needs some additional tweaking to keep the noise levels down.
GM's chief engineer for small-block
engines, Jordan Lee said, 'It's also worth mentioning that the LT4's supercar performance numbers are achieved with an engine that is nearly the same size as the very compact LT1 engine introduced in the 2014 Corvette Stingray.
At one-quarter of the size of a small-block
V-8 and with a tremendous power-to-weight ratio, the engine may be the perfect candidate for hybrids.