On or around Sat, 27 Nov 2004 07:32:01 -0000, "Paul - xxx"
<
[email protected]> enlightened us thusly:
>I think the one I had for a while might have had a hard life then because it
>really did feel underpowered, yhough we drove it all the time with a load in
>it and passengers. We never tried it empty or solo. I guess what we
>experienced differently could be down to the low torque output.
dunno what gear ratios they use, but I reckon the MPi should have the same
ratios as the 110 turbo pre-TDi or something. The engine is much
higher-revving, redlines at about 6000 instead of 4500, and the peak torque
is correspondingly higher.
You'll get the reverse of the situation you get when people trained on
petrol-engined cars get in a diesel - they rev the nuts off it, going up to
4000+ revs in every gear, despite the fact that even on a normnally-tuned
TDi you don't get worthwhile acceleration much over 3500, and in fact can
get better results by changing up before 3500 and using the torque in the
next higher gear.
by contrast, getting the best from the MPi involves probably changing up at
about 4500 or 5000 revs - the engine will be "on song" at those sort of
levels, and you'll hit about 3000 in the next gear which should get you to a
decent spot on the torque curve (note, I've not actually driven one, but I
have had experience of a similar engine in a minibus)
However, if they geared it the same as the TDi/V8 then I'd expect 5th gear
to be very much an overdrive for motorway cruising. I'd reckon on being in
2nd, 3rd and 4th most of the time.
However, you could always fit transfer gears for a TD 110/90 which IIRC are
about 1.4-odd instead of the 1.2-odd for the TDi and V8.
The V8 has much more torque, especially a 3.9, so you don't get the same
"gutless" feeling that you get with a smaller petrol engine. However, you
get the V8 revving up in the 4-5000 area and it flies... as does the money
from your wallet, of course, in petrol bills