Driving the 4.2 efficiently while still having fun

[HEo2TEC]

I had 25 once

[BlingBling]

The best way to improve economy without taking away any fun is to switch the fecker off in traffic or at the lights. A manual stop/start function.

[PetrolDave]

Was there not something written a while ago that in modern engines and particularly FSI that neutral coasting actually used more fuel than in gear deceleration because the engine ECU's matche fuelling and timing to the in gear sensors. If they don't have this they overfuel slightly?

Plus neutral coasting means the engine is being fuelled 100% of the time, but with in gear deceleration the fuelling is completely cutoff when the engine rpm is above around 1400rpm and the throttle pedal is in the rest position.

[RS6chris!]

Best mpg I hit was an average of 32 but that was about 20miles of motorway roadworks.

Same as me.....20 odd miles of 50 mph average speed cams on M1..

[Ian_C]

The only time I have EVER seen 30 mpg on the trip was coming home from Ace Cafe, I'd been there just over two hours hence the DIS resets, but the engine was still warm, 60 seconds after leaving you are onto 50 and 40 mph north circular, stick the cruise on as I don't want any more points, nice clear traffic on a Sunday night, just clicked to 30.0 mpg as I came off to pick up the A1. Thats probably five miles

[rs4blacked]

in mine on a run from suffolk to Birmingham both with cruise control on

at 80mph 23mpg
at 70mph 26mpg
at 60mph 30mpg but takes way tooo long

[22B]

I can remember getting 27 mpg once, I was bored shitless at the end of it though.
Since the supercharger & the 100 cell sports cats etc were fitted, mpg has went down a bit,- the noise is so good you just want to melt it everywhere. Did a 350mile run recently up to the Highlands driving pretty conservatively with a few good blasts and the overall was 21mpg.

[MB2]

I think we all agree that a taller sixth would be handy on the manual, quieten things down slightly when you want to gobble up motorways at 90 and 100. Fifth and sixth are so close - there must be drives where I don't use fifth once (go straight from fourth to sixth)

I regularly deliberately miss gears out, shifting from 1st to 3rd to 6th.

6th is good to ridiculously low speeds, it really needs to be geared closer to 35 or even 40mph per 1000rpm to make it a useful gear - but this was an issue with the S4 as well and the RS4 uses the same 'box.

That is interesting, I always assumed the ratios were to allow the engine to be kept in its power band rather than had been borrowed off a lower revving version, but guess am too used to bikes where gear ratios are more important to get spot on - some had 70-80 in first gear with slow gettaways so could stack the rest of the ratios in tightly for use once underway but of course the readline is much higher eg. 12,500 rpm

[Dave7]

Wow - just WOW! Sounds a bundle of laughs!

I though coasting was boarderline ellegal also?

I reckon you should sell it and buy a Metro 1.0HL.

Prolonged coasting IS illegal!

I think he should buy a turbo diesel and be done with it...

I drove from Porthmadog in North Wales where my parents live to Bristol airport last night right through the middle of sheep shagging country to collect my wife and baby girl and I averaged 17mpg and used most of a tank of fuel. It was one of the best drives I have ever had! Wales does have some amazing roads but please.... no costing!

[thedoluk]

My long term average is 15.7 rarely get more than 200 miles per tank.

[andre3k]

I think I have to agree its kinda pointless trying to be frugal in the 4. Far easier to buy a runaround

[adsgreen]

Wow - just WOW! Sounds a bundle of laughs!

I though coasting was boarderline ellegal also?

I reckon you should sell it and buy a Metro 1.0HL.

Prolonged coasting IS illegal!

I think he should buy a turbo diesel and be done with it...

I drove from Porthmadog in North Wales where my parents live to Bristol airport last night right through the middle of sheep shagging country to collect my wife and baby girl and I averaged 17mpg and used most of a tank of fuel. It was one of the best drives I have ever had! Wales does have some amazing roads but please.... no costing!

Just to clarify here - coasting isn't in itself illegal however it is against the highway code recommendations http://www.direct.gov.uk/en/TravelAndTr ... /DG_070304 and really wouldn't fancy your chances if you had an incident and it could be shown somehow that you were coasting at the time.
You may be running the risk of a 'driving without due care and attention'.

[Dave7]

You may be running the risk of a 'driving without due care and attention'.

You can also get a bollocking for - 'Driving an RS4 without having fun'?

[Terry1948]

Perhaps Driving the 4.2 efficiently = smooth driving, thinking ahead and of course like all RS4 drivers obeying the speed limit
It is a german car so you must obey.

[wolfgang]

Desperately tried to get above 18mpg this week on some longish runs. Failed miserably, but i'm still grinning!