gwr northants Posted May 18, 2014 Report Share Posted May 18, 2014 went and cleaned my new cab out today based down near hemel , about 50 mile each way from my house , cruising at a shown 85 mph my t5 volvo shows an indicated , 28.5 mpg (not bad for a 5000 tonne car and 280 ish bhp ) put a/c on it dropped to a shown 25.8 to 26.2 mpg fair drop really tbh , just aswel i have windows lol !!!! Quote Link to comment Share on other sites More sharing options...
mikescooby Posted May 18, 2014 Report Share Posted May 18, 2014 thats good to know Quote Link to comment Share on other sites More sharing options...
gwr northants Posted May 18, 2014 Author Report Share Posted May 18, 2014 Tbh mike I knew it knocked the mpg down , but that's like 10 percent or close to it , bit of a good drop really Quote Link to comment Share on other sites More sharing options...
mikescooby Posted May 18, 2014 Report Share Posted May 18, 2014 I feel it when it comes on my scooby. But i dont really use it much Quote Link to comment Share on other sites More sharing options...
Steve Posted May 18, 2014 Report Share Posted May 18, 2014 Took the belt off mine Quote Link to comment Share on other sites More sharing options...
Rob5 Posted May 18, 2014 Report Share Posted May 18, 2014 Took the belt off mine Took all the air con out of mine Quote Link to comment Share on other sites More sharing options...
Steve Posted May 18, 2014 Report Share Posted May 18, 2014 Took all the air con out of mineMine will all be coming off when the new engine goes in Quote Link to comment Share on other sites More sharing options...
Marv Posted May 19, 2014 Report Share Posted May 19, 2014 I have to say it makes no difference at all in the Merc - on or off, same mpg Quote Link to comment Share on other sites More sharing options...
gurn Posted May 19, 2014 Report Share Posted May 19, 2014 my scoob never had a 'power zapping' button....... aka A/C.The vxr does..... but hey..... its what fuel is for....... BURNING!!!!!Didn't buy a V6 turbo for the fuel efficiency, so the a/c is gonna make naff al difference!!!........ lol Quote Link to comment Share on other sites More sharing options...
RichRB320 Posted May 20, 2014 Report Share Posted May 20, 2014 Drove down to Heathrow in the A4 on sunday and did this test and it made no difference but in the RB there is a notable feel of restricting the power...Maybe a TDI versus turbo petrol engine thing etc..??? Quote Link to comment Share on other sites More sharing options...
gwr northants Posted May 20, 2014 Author Report Share Posted May 20, 2014 Rich my t5 is a petrol mate ? Straight 5 cylinder 2.5 liter turbo ,at be some cars it's more of a strain ? I don't know I'm not clarkson lol , saying that he's a thick fooker so maybe I am !! Quote Link to comment Share on other sites More sharing options...
-Stealth- Posted May 20, 2014 Report Share Posted May 20, 2014 Simple explanation is that in one direction you were travelling into the wind, and other you weren't lolI remember reading something about above a certain speed the aircon makes no difference due to the drag of having the windows open is less than or equal too the resistance on the engine.It's only in urban driving/traffic situations that mpg decreases due do the extra load at idling. Quote Link to comment Share on other sites More sharing options...
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