Are new petrol turbos as efficient as diesels?

batman1

I have a 1.6 diesel focus and do around 20k per year, a 15 mile daily commute and the odd run of 60/70 miles at the weekend. I'm considering changing the car next year.
Looking at various manufacturers sites there appears to be a lot of new cars with small petrol turbo engines and the difference in economy figures between them and their diesel options are very little. I took the seat alteca as an example.

Have newer petrols become more efficient fuel wise or should I stick to diesel for the cost alone?

Leonard Hofstadter

If that's 20k miles I'd stick with diesel, if it's kms it depends on how much you value refinement and smoothness over running costs.

colm_mcm

Nope, I think the engineering of turbocharged petrol cars to do well in specific standard testing is rife. Actual mpg is often way off. See Ford Ecoboost and Fiat TwinAir

Lantus

All mpg figures for diesel and petrol are optimistic as the tests the figures are based on are skewed.

The city portion of the test involves being stationary for 30% of the time? Do the stop start tech really skews the figures.

However the new petrol is much better. I do 100km a day and get 5.4l/100km without difficulty driving normally. I know if I hypermiled I'd do better.

The new petrol engines are good and will be much more in demand as time goes on. Price differential can make them better value as well.

gctest50

Tesla model S ?

PaulKK

gctest50 wrote: »

Tesla model S ?

OP enquires about small petrol cars and currently has a diesel.

Mentions they are interested in a car that costs 30-35k new.

You mention a car that is electric, of which there are only 3 for sale on carzone with the cheapest listed asking price of 73k for one that is a year old.

Do you see any flaw in your logic here?

OP this looks like you do 20k km a year. A 30 mile round trip commute and 160 mile trip every second weekend is roughly 12k miles or 20k km. I would go for the petrol.

ancuncha

What specific cars are you looking at?

I'm changing my car at the moment and would be interested in looking at petrol, but i like the economy of diesel!

I'm driving an A4, doing 50mpg (short running, that's my own figures i checked it several times and its always around 51-54mpg so i am low balling the figure) and doing around 7,000 miles in the year and pay €673 in tax

spending around the €4000 mark

Sleeper12

Diesels are getting bad press at the moment. Wait till the budget before you decide. I have a feeling diesel might be more expensive than petrol at the pumps soon.

Toyotafanboi

I personally wouldn't buy a diesel for 15 miles a day.

gctest50

PaulKK wrote: »

OP enquires about small petrol cars and currently has a diesel.

Mentions they are interested in a car that costs 30-35k new.

You mention a car that is electric, of which there are only 3 for sale on carzone with the cheapest listed asking price of 73k for one that is a year old.

Do you see any flaw in your logic here?

OP this looks like you do 20k km a year. A 30 mile round trip commute and 160 mile trip every second weekend is roughly 12k miles or 20k km. I would go for the petrol.

Sorry wrong model


Tesla model 3

bazz26

You will be waiting about 3 years at this rate for the first Tesla Model 3s to arrive here.

jsd1004

bazz26 wrote: »

You will be waiting about 3 years at this rate for the first Tesla Model 3s to arrive here.

Mine is due for delivery late 2018

jsd1004

jsd1004 wrote: »

Mine is due for delivery late 2018

Hate you:D

bertie4evr

jsd1004 wrote: »

Mine is due for delivery late 2018

Seeing as they've only managed to make about 250 cars in the past 3 months I don't see them meeting any delivery dates!

bazz26

jsd1004 wrote: »

Mine is due for delivery late 2018

http://www.express.co.uk/life-style/cars/861818/Tesla-Model-3-production-delays-2018

R.O.R

Petrol hybrid would suit the OP. Will be more efficient than a diesel on short journeys and not far of on long journeys.

Had a Prius for about 3 weeks last year on my 62km each way commute which was returning under 4 l/100km long term. With a price difference between petrol and diesel it worked out equivalent to a diesel at 4.3 which is pretty good but a modern diesel on the same journey would be around 3.9.

anewme

I have a new 1 litre 3 cylinder petrol engine. Must check what's it's actually returning.

It's really nice to drive and fairly nippy.

Pugzilla

Please don't put any more diesels on the road.....

eagerv

batman1 wrote: »

I have a 1.6 diesel focus and do around 20k per year, a 15 mile daily commute and the odd run of 60/70 miles at the weekend. I'm considering changing the car next year.
Looking at various manufacturers sites there appears to be a lot of new cars with small petrol turbo engines and the difference in economy figures between them and their diesel options are very little. I took the seat alteca as an example.

Have newer petrols become more efficient fuel wise or should I stick to diesel for the cost alone?

I quick answer to your question is yes.

But still not as efficient as a diesel, so depends upon your mileage and type of driving.

I changed about 5 months ago from a VAG 1.6 Diesel to a Honda 1.5 Turbo Petrol. I always fill the car brim to brim and check and record consumption.

The lifetime actual average of the diesel was 56 MPG and so far my petrol average is 48 MPG.

The petrol consumption is better than I expected.
Approx 16% lower than the diesel, but I have about 73% more horses.

anewme

anewme wrote: »

I have a new 1 litre 3 cylinder petrol engine. Must check what's it's actually returning.

It's really nice to drive and fairly nippy.

Checked this morning and my journey to work (about 20km) averaged at 5.7l per 100m (so the dash told me)

batman1

Ok. Lots to consider. I noticed a huge difference in fuelling when I went from a 1.4 petrol to the 1.6 diesel. Wouldn't want to go back to filling up more often.

That said, the car does 20k per year and I've noticed the price difference between diesel and petrol cars is not huge anymore.

The seat ateca comes in a 1.0 petrol turbo.

I considered hybrid but not much choice and expensive for the suv types.

On a slightly related note, how do the new petrol turbos fare for power ? I see the bhp are similar to diesels but do they get the same torque etc for overtaking and such like?

DaveyDave

batman1 wrote: »

Ok. Lots to consider. I noticed a huge difference in fuelling when I went from a 1.4 petrol to the 1.6 diesel. Wouldn't want to go back to filling up more often.

That said, the car does 20k per year and I've noticed the price difference between diesel and petrol cars is not huge anymore.

The seat ateca comes in a 1.0 petrol turbo.

I considered hybrid but not much choice and expensive for the suv types.

On a slightly related note, how do the new petrol turbos fare for power ? I see the bhp are similar to diesels but do they get the same torque etc for overtaking and such like?

Can't speak for other manufacturers but I know the torque is available in low revs on the VW turbo petrol engines, quite a fair bit of torque too. Not diesel levels, but pretty good.

In terms of overtaking, the problem with petrols not having torque for overtaking is that people drive then wrong, you usually need to drop a gear in a petrol to get the torque for overtaking, which people don't seem to do.

Best thing to do would be to have a look at the power/torque curve for a particular engine.

dbagman

What's with all the diesel hate? Esp if you're in the second hand market it's pretty much all that's available unless you go across the pond. Why the sudden hate? The only petrol I ever owned was a 1.4 focus and I remember it as being a thirsty fecker. The new diesels are as good and as comfortable as any petrol if you ask me.

ShadowHearth

I switched from 1.9 jtdm(04) to 1.8t(2017) petrol.

Computer on diesel said: 6.5l/100km
Computer on current car says: 7.5l/100km

I drive "enthusiasticly" for 120km trip a day for work.

Yes, diesel car was cheaper, but it was not that much cheaper for me to feel it in a pocket. I will say though that, I get way more smiles per km now, then I did before.

Diesel on long trips will still be cheaper, but petrol got way more efficient lately. My wrx scooby (05) was killing me in fuel spending.

deathtocaptcha

Regular petrol hybrids are the way to go at the minute. The only problem is most of the hybrid cars look like **** - it's as if car brands deliberately sabotage hybrid car designs to put people off buying them.

Diesels will be taxed off the roads. It's inevitable. If costs at the pump don't go up, car tax will. There's also a big effort now being made by governments in Europe to get them off the roads. They're the cigarette of engines.

SBPhoto

deathtocaptcha wrote: »

Regular petrol hybrids are the way to go at the minute. The only problem is most of the hybrid cars look like **** - it's as if car brands deliberately sabotage hybrid car designs to put people off buying them.

Diesels will be taxed off the roads. It's inevitable. If costs at the pump don't go up, car tax will. There's also a big effort now being made by governments in Europe to get them off the roads. They're the cigarette of engines.

Didn't happen in the last budget, despite all the anti diesel brigade stating that the diesel was going to get a hit. I do agree though that diesel car will be phased out in the future, but will take some time

dbagman

deathtocaptcha wrote:

Diesels will be taxed off the roads. It's inevitable. If costs at the pump don't go up, car tax will. There's also a big effort now being made by governments in Europe to get them off the roads. They're the cigarette of engines.

They can't change the car tax band to force diesels off the road much in the same way when they brought in the emissions based taxing it had a start date and didn't effect any cars previous to this date. They can change it but it will have a start date too and that will probably effect cars sales in the way it's made them diesel heavy the last 10 years.
They wont hit diesels at the pumps either as that would have a massive effect on industry. All the truck and van fleets on the road need it to keep the country moving and that would have a devastating effect for them and in turn drive up prices on everything to fund it. It will be the average joe that will end up paying more at the tills because the cost of delivering their weekly shop to Tesco will sky rocket with massive diesel hikes.
Iv No doubt in time diesel will be made unattractive but it won't be today or tomorrow.