I have a 96 wide body 2.0. I got it measured recently and she is purring off 148bhp. However when you open the throttle there is nothing really. You dont feel any pull whatsoever. Its like it has all the power but no torque. No excitement when its opened up. The revs build and everything sounds like it should but I have driven standard 2.0 155s before and felt much faster and quicker off the mark. I dont think its a spark plug problem, or at least it doesn't feel like one. There is no juttering or flat spots, it just takes longer than I would expect to get up to speed. At an Alfa meet recently there was one other 155, a 1.8 and I think his was actually faster. I was behind him and had to push very hard to keep up and there is no modifications to his. The one thing I would say is she has 146K on the clock but with 148 bhp that shouldn't matter. Should it?
Any ideas what could be causing it?
My 16v feels the same....it only has 56k covered and has recently been serviced -new plugs and new belts and variator...
I was loaned a 8v 2ltr 164 which felt much much quicker....all down to torque I guess. Now, as I was quite concerned I did a back to back test with a borrowed 8v 1.8 155 against my own 16v.....read on for the results....if you don't fall asleep due to the length of the reply
The test circuit is a mixture of A, B & dual carraigeway covering about 15 miles - starting and finishing at the same point (my house)...... with a good mix of straights, corners, hills and flats to test the two engines (the 8v is in excellent condition btw)
So, I ran the test route in my car first....just driving within the spirit of the law - fast but safe. I made a note of the speed at certain points on the route and timed the route, both total and in qtrs.
The 16v covered the route in just over 27 minutes with a maximum speed of about 80 ish at one point....(remember, I wasn't going for a top speed run...it's how the car performance feels on the road) revs used up to about 4500'ish.
The 8v covered the route in about 30 mins with a similar top speed....but it felt faster. again I'd recorded speeds at the same points as in the 16v and also did the split times at the same points......
At almost every point the 8v was about 10% slower than the 16v....!!!
So I took the 16v out again and this time used the performance - revs held to about 6500 in lower gears with stronger acceleration - not balls out, but using the performance.
Times worked out at 23 minutes.....which was more to do with clearer roads and the fact that I could easily overtake other traffic.....and the car still didn't feel as fast as the 8v
Now that's over 20% faster than the 8v...but it still feels slower?
So finally as a benchmark...I drove the same course in my Impreza....which with not too much effort managed an 18 minute circuit time....and finally felt quicker than the 8v (and much quicker than the 16v)
..and the conclusion is....it's down to the way that the engines deliver torque - the 8v is a lugger - not matter where you shove you foot down in the rev range...it will feel like it's reponding....the 16v comes alive at higher revs...so doesn't feel that exciting as you will already have momentum in the engine and won't get the same thrust sensation...but it is a lot quicker.....especially at higher revs with the lower valve mass and better breathing help.
If I really tried, I reckon I could knock quite a few minutes off the circuit time in the 16v, where as the 8v would be running out of steam quicker....
the final conclusion...to make a 16v rally exciting...it needs 2.5 ltrs, a bloody great turbo with intercooling, 300+bhp and 4wd