Couldn't find specific engine weights, but the (unladen) weight differences between the 328i and 335i coupes are as follows:
3 series (coupe)
- 328i: 3351 lb
- 335i: 3571 lb
If the difference between the 128 and the 135 is also around 200 lbs, then that might be a tough choice.
As much as I like the idea of 300 HP, I also like the idea of a lighter, nimbler, maybe-even-better-handling (
) 128. 200 lbs is nothing to sneeze at.
And even though the turbo engine is supposed to be brilliant, I think I'd really prefer the instant, linear throttle response of a naturally aspirated engine in a sporty little car like the 1-series. The turbo motor just seems a better match for a bigger, heavier, more GT-like car, such as the 335.
Plus, I'm not sure I like all the tacked-on "sporty" plastic skirts that come on the 135. I won't be sure until I see one in the flesh, but I think I much prefer the simpler, cleaner lines of the base 128.
Everybody seems to be lusting after the 135, but I think that a 128 (with a sport suspension package, if it's offered) just might be more fun to drive in the real world.