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At the risk of sounding ignorant, what does A4 mean?


Guest Anonymous

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Guest Anonymous

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Multi-throtle(4) injection system designed by Alpina - hence the A and the 4. The complete conversion came with more than just the injection components, hemi heads, high compression pistons etc and was capable of pulling 160-170 hp. Macartney has a write up on his book.

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Guest Anonymous

It's my understanding the A4 equiped cars were just ITB Kfish... a 300

sport cam and 121ti euro 10:1 pistons... I believe the A2S, A3 and

the A4S were the only ones to come with hemi heads, hemi pistons and

modified standard connecting rods. The hemi gave it about 5-6ftlbs of

torque boost and while the A4 system produced 160HP on their

engines.. bolting a A4 system on a tii engine would not yield the same

gains as the larger exhaust valves, the .5-.7CR and the 300 sport cam

are missing. Most A4 replica cars are missing this and would probably

generate a power output in the 140HP range.

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Guest Anonymous

probably would give 140-145, assuming by "stock" you mean 9.0:1 pistons and 264 cam. Most systems I know of have at least 9.5:1 pistons and 292 cams. That is within the margin of error of the original A4, IMHO. Also, accroding to BMW Car mag., a recently built A4 -- built by Alpina -- tipped the dyno at 185 and the (again, according to BMW Car mag) the original Alpina "factory" figures were notoriously low, by about 5-10 bhp.

What's true? Who knows. Just reporting what I've read and seen (and felt from the seat of my pants).

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Guest Anonymous

before I couldn't get over 20mpg, but now cruising at 80 - 90 mph I get 22! Oh, I just found a way to justify the 1500 euros!

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