PineConeChevy, GM apparently used a lot of the good features of the older engine series (216/235/261) in the later thin-wall casting models. Both series have reputations as reliable and relatively powerful engines. Remember that the V-8s are better at producing horsepower than torque and the 6s are usually better at producing torque than horsepower. My BMW 325is has a 2.5 liter (152 cubic inch) straight 6 engine in it. I think the body size and weight are close to the late 1970s Chevelles. I use the cruise control a lot and the surrounding area is pretty hilly. Set it to 60 mph, which is about 2600 rpms, and it maintains 60 mph, no matter what. I have the manual 5 speed, so there isn't any question of shifting down if it gets in trouble. Fortunately, it never gets in trouble. I idle around town in 4th gear to save gas, and because I can.
I like I-6s. The V-6s seem to need to run at higher RPM to get the same job done.
