Originally Posted by Mike-2ptzero

B6 A4 1.8t 6 speed
3.667 (15.08)
2.053 (8.44)
1.37 (5.63)
1.032 (4.24)
0.8 (3.29)
0.658 (2.71)
Final drive ratio 4.111

Originally Posted by vtraudt

Hmh.
Also found this info on B6 A4 1.8T 6 spd:

B6 1.8T 6 speed quatto: Overall ratio 6th: 2.5674
1st 3.67:1
2nd 2.05:1
3rd 1.42:1
4th 1.03:1
5th 0.80:1
6th 0.66:1
Final Drive 3.89:1

What IS the final drive of the B6 1.8T 6spd. 3.89 or 4.111 ??

Originally Posted by Mike-2ptzero

That is correct. That would be high for a V6 or V8 but not high at all for a 4 cylinder.




Which is good gas mileage for driving those speeds.




Sorry to tell you this but a lower rpm at the same speed is not going to increase your gas mileage. The lower the rpm the less power your little 4 cyilinder is making while out of boost, this means to hold that same speed you would have to use more throttle which means more boost(less vacuum) which means more fuel is being sprayed into the engine. The larger displacement engines run at lower rpms because they are spinning more parts and feeding more cylinders with fuel. Just look at how bad the MPG is for the V6 cars including the 2.7t vs the 1.8t with its much higher rpm. Audi even listed the MPG for the B6 A4 1.8t 6 speed lower vs the B6 A4 1.8t 5 speed, only difference was the gearing.

The A4 5 speed does have shorter gearing, but that helps increase acceleration. Put a transmission with taller gearing and your car will just end up feeling even slower then it did with the stock transmission. I have already proved that at the track, 2.8 5 speed(taller gearing) vs 1.8t 5 speed (shorter gearing). With the 2.8 gear box the car went around 11.3 at high 120's, with the 1.8t gear box the car went 10.6 at 135+.


This is why I still run the stock 5 speed 3rd-5th gear, I put in slightly taller 1st/2nd gear out of a Audi Coupe 4.11 01A transmission.