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      07-08-2008, 08:21 PM   #57
Lassaxi's Avatar

Drives: April ED - E90 328xi
Join Date: Nov 2006
Location: Boston

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Originally Posted by malbec View Post
Lassaxi---why would you not notice the extra torque in the 335d? My 335i has 300LB-FT. How could you not notice another 125 LB-FT in a car that weighs about the same---especially when already cruising on the open road.
I 'm thinkin this car will crack your head back from 50-80mph especially with the 7 speed DCT. More torque than a 550i, more than an M3! Yikes! More torque, gotta like that-and throw in better mileage. Sounds great!

I didn't say you wouldn't notice the extra torque in the 335, but it's a bigger deal in the heavier X5. The 335d is going to pull damn hard down low, but the 335i doesn't really have a problem with feeling sluggish off the line. The higher HP in the 335i is beneficial because that car is relatively light, and is better poised to take advantage of gearing.

The X5 is a much heavier vehicle, and needs more oomph to get moving off the line. An X5 3.0 feels somewhat sluggish, and needs a heavy foot to feel responsive. It's much more lively with the V8 engine (which has great HP and torque), but you pay a significant fuel economy penalty for the V8. The torquey diesel engine is going to make a heavy car like the X5 feel much more lively in everyday driving without incurring the same mileage penalty as the V8 gas engine.

The 335d will gain a similar benefit, but it's comparator, the 335i, is already fast, powerful, and reasonably efficient. The X5's comparators are either sluggish (in 6-cyl form) or inefficient (in V8 form), which means that the diesel engine will be a more compelling option in the X5 than in the 3er. I think Alpine6speed's exactly right- if you drove all four cars back to back (335i, 335d, X5 3.0si and X5 35d), you'd probably find the diesel to be a more compelling option in the X5 than the 3er.
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