Diesel Vs Petrol

[Rich_Eason]

Fuel economy may not be a concern due to low mileage but road tax might be. Isn't road tax increasing soon based even more on emissions? Check current rates HERE.

 

Eg/. 2.0ltr, 180bhp petrol £190.00

1.6ltr, 110bhp diesel EGS £50.00

 

Already is £190 IIRC

[wozza]

But diesel services are more often resulting in that saving being null. You may save £140 on tax but it costs you an extra £300 for your 2 services every 20k+ miles while its only 1 for us petrol owners.

 

Diesel being more expensive than petrol too etc. Its false economy unless your doing loads and loads of miles say 20-30K+ a year.

[Z3M Roadster]

The tax on my VX is £190pa

[bill03]

I "PREFER" driving a turbo diesel.

I've done all the petrol head, rev it to x000rpm driving experience bit. I grew out of it. Don't need it now and too much traffic, speed cameras etc to bother these days.

So drive what you enjoy because in a few years you probably won't be allowed to drive anything more than a 50cc moped running on vegetable oil.

[wozza]

Im still young im enjoying my driving like I stole it days lol.

[bill03]

I hope you enjoy it for a long time Wozza. :D

[iannez]

i am not saying i prefer diesel over petrol. i am saying i prefer the 1.6hdi to the 1.6 petrol. i am still young and like the odd blast and thats why i have a 267bhp petrol turbo. only i dont have to rev its pods of to get it to go fast or sound nice. <_< :D :P :D :P

[wozza]

Gimme a few months will be saying the same when theres 2 petrol V8 cars on the drive. A corvette and a Mustang.

[iannez]

wehey. just think after 2 weeks of driving these you will have collected enough fuel card points to get a c4hdi

<_< :P :P :D

can some one tell wozza where santa pod is lol.

[wozza]

The vette will be my mums mustang will be mine. And there actually surprisingly good on fuel. The 5.7 V8 corvette old shape will still get around 37mpg on the motorway and around 29 around town mustang gets similar figures which after a little playing about can be increased when its mapped for british fuel.

 

The best thing is though the price of the cars. My mums going out in a month to test drive some vettes she is gonna be getting either a 1 or 2 yr old one save the huge hit on depreciation and have it run in etc. But should be able to pick up a mint example for around £20k. Not many cars with similar abilities you can get for that.

 

And they will be going to pod the cars. Although i have a funny feeling i will want to borrow the vette more for that until i can afford to put some money into my engine. Looking at a new job though working with my cousin and if i get that wage will be fairly good. Starting at £23k and if i do extra training in the first few months can jump up to just short of £30k. And they will pay for me to finish uni....result! Obviously wanting job very much now lol.

[Z3M Roadster]

Surely those fuel figures are a little optimistic. I could just about imagine mid 30s on the motorway as my dad achieved that once in his Griffith 500. Not a hope in hell of getting 29 around town, i'll bet high teens.

 

I used to get about 20mpg from my bmw round town and 30mpg on the motorway. My friend gets 16 round town from his 996.

[iannez]

i get around 20mpg round the doors and 40mpg on a run driving like a nun. can get it down to 9 mpg when driving like a loon tho.

[wozza]

Difference is the low end torque around town you barely need to take them above 1500rpm. And those are figures according to someone i know who owns a C5 5.7 corvette.

 

The mustang figures during break in can be absolutely awful 18mpg on the motorway possibly single figures around town etc but after a few thousand miles it'll do 30+mpg. Spoken to one guy who has put a supercharger on his and says his mpg went up as a result 29mpg around town since and he has 460+rwhp.

 

Its cause of the amount of torque. Bigger engines can get better consumption than smaller turbo'd units due to not needing to rev as much. A 700bhp corvette can still get similar MPG as it does stock cant say the same about a 300bhp increase on an evo or porsche etc.

 

When you look at American figures and see the MPG they get there remember there gallon is smaller than ours so you need to increase that by 18% or so.

 

Either way before the cars we have to find another house. Due to my mum being in a wheelchair now were looking to find a suitable bungalow as its hard work in our house for her to get around. Which happens to be the main reason i moved home as well. My god do i miss my flat <_<

[BigJohnD]

Those consumption figures for Mustang and the 'Vette are extremely generous. I used to drive a Fiat 130 Coupé wih a Ferrari based 3 litre V6. Typical mpg was 19-20 mpg, with about 23-25 on long interrputed journeys. Any boy racer antics would make a big dent in those figures.

[wozza]

there actual figures published are 28mpg motorway on the stang. But thats american gallons which equates to around 33mpg UK. Now since the stang can be tuned by anyone its just a case of picking up a £200 tuner and plugging it into the diagnostic port. add some small mods, pulleys, induction kit, remap gain around 30-40bhp and similar gains of torque and according to every stang forum i have looked at with every person who has done those mods MPG went up by 3 -5. putting it around 36-38mpg. And able to get around 30mpg around town. Mainly due to engine operating in similar areas around town and on motorway due to gearing.

 

But suppose its where you drive taking it through city centre manchester in rush hour i would expect it to be in the teens. But around bury where i live which is quite i have sat and done 6 miles before through the centre of the town only braking for lights twice and keeping constant 30mph and had the C4 getting in the 50mpg area.

 

Either way i dont think teens would be bad considering until today my C4 was getting a whopping 23mpg after lots of motorway today though its above the 29.3mpg average its been getting over the last few thousand miles.

 

But it is impossible to get more out of it than that. Which i always thought was odd but ham said when he had his xsara with the same engine he got similar MPG so im happy with that now.

[Z3M Roadster]

You'll probably be seeing 30mpg at idle, however when you move it'll be a different story.

 

How come the Ford GT only achieves about 6mpg then?

 

Range Rover 4.6 does about 10mpg, ok it's not that aerodynamic but still.

[wozza]

ford gt has a roots type supercharger so basically its always on boost as a result. Where as centrifugal chargers take a little longer to come on full boost but will give more top end grunt rather than low end grunt.

 

Also the gt has a larger engine a 5.4 also revs more. Mustang also has VVT and all that crap to help bring fuel economy down. Also gearing on the gt is lower etc.

 

Theres loads of differences between them the 5.4 in the gt is a new engine really its based on the 5.4 iron block from the f150 but turned into an alloy block and had a few adjustments. Mainly its the blower that causes the extra drag on fuel economy though.

 

And the range rover weighs a bloody tonne.

 

Breaking in period will be in mid high teens on a combined cycle on both cars. After a few thousand miles and a tune etc should be able to make it above 30mpg on a combined cycle which is roughly what i get in my C4. Which was reading 22.3mpg yesterday after a lot o time stuck in traffic. But did a 150 mile trip and up to 29.7mpg now.

[jimbobfruitbat]

Torque will get you up a hill, power will get you off a line quick.

 

Think 1.6 diesel v's 1.6 petrol car going up a long steep hill on a motorway.

 

The diesel will happily go up the hill without worries where as the petrol you may have to change down...

 

 

...which makes me wonder - why does the EGS gearbox on a diesel VTR+ still change down gear when going up a hill on a motorway, when it really doesn't need to? It looks to me like the EGS gearbox hasn't been tuned to accomodate the abilities of a diesel engine. Also has a habit of changing down to either 5th or 4th whenever I go to overtake, even though I'm sure the diesel engine would cope in the higher current gear.

[CoolCarbon]

...which makes me wonder - why does the EGS gearbox on a diesel VTR+ still change down gear when going up a hill on a motorway, when it really doesn't need to? It looks to me like the EGS gearbox hasn't been tuned to accomodate the abilities of a diesel engine. Also has a habit of changing down to either 5th or 4th whenever I go to overtake, even though I'm sure the diesel engine would cope in the higher current gear.

 

Keep it in 'Manual' and it wont change down.... :o

[jimbobfruitbat]

Keep it in 'Manual' and it wont change down.... :o

 

Well, that's the only solution. Better get paddling!