Quote:
Originally Posted by buckeyemike
Because fuel economy. This is going to be the future, so I'd suggest accepting it.
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The LT1 would get roughly the same mileage as a TTV6. The V8 might even get better efficiency if they up the boost on the 6 so that it matches the LT1. Not that it really matters anyway because a difference of 1 mpg (between the TTV6 and V8) on a sub-model that will represent something between 0.1% and 0.2% of GM's annual US sales isn't going to move the needle very much on GM's overall CAFE score.
You put a TTV6 in a car like that for cost/simplicity purposes. The fewer engine families a car has, the simpler it is to build. The simpler a car is to build, the cheaper you can build it. This is the same reason that turbo 4 cylinders are replacing V6s in midsize cars.