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Join Date: Mar 2001
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Re: E60 535D - BMW Fastest Diesel 353 HP (!!!)
in so many words- what digger said.
or to put it differently- the diesel has more tq, but fewer revs (lower redline). this forces the gearbox to be geared very long so the diesel will not run out of revs at higher speeds. well, it just happens so that even with its monstrous torque, at higher speeds the gearing is so steep that it actually puts less tq to the wheels thus providing weaker acceleration.
on the same token, at lower and midrange, where roadspeeds are lower and allow shorter gears, the diesel shines.
a rule of the thumb is that diesels are superior to 100ish mph (more torque, ok gearing) and petrol engines- above that (less torque but much more favorable gearing resulting in more tq to the wheels)...
Last edited by AJ; 17th February 2005 at 03:57 AM.