Hill starts different in petrol or diesel? Am i mad?

SATSUMA

Ok so i just picked up my kia ceed 1.6 diesal. Im used to driving a 1.2 petrol.

Random question.... i cant seem to do my hill starts properly????

Am i going mad or is there a difference?

SATSUMA

SATSUMA wrote: »

Ok so i just picked up my kia ceed 1.6 diesal. Im used to driving a 1.2 petrol.

Random question.... i cant seem to do my hill starts properly????

Am i going mad or is there a difference?

a diesel will usually have a bit of torque that will move the car forward at a walking pace if you let the clutch off easy. a petrol, in my experience, wont

Rusky rusky

SATSUMA wrote: »

Ok so i just picked up my kia ceed 1.6 diesal. Im used to driving a 1.2 petrol.

Random question.... i cant seem to do my hill starts properly????

Am i going mad or is there a difference?

Diesels have quite large turbo lag so rev it up

Duckjob

Deleted User wrote: »

a diesel will usually have a bit of torque that will move the car forward at a walking pace if you let the clutch off easy. a petrol, in my experience, wont

This. With no input from the accelerator, my 1.9 diesel can in happily lug itself in 2nd gear up the steepish ramps between levels in multi story car parks . Havent tried it in a petrol but I'm pretty sure it wouldnt happen.

colm_mcm

Duckjob wrote: »

This. With no input from the accelerator, my 1.9 diesel can in happily lug itself in 2nd gear up the steepish ramps between levels in multi story car parks . Havent tried it in a petrol but I'm pretty sure it wouldnt happen.

Modern diesels often lack that initial grunt at 900 or so RPM that the likes of an older VW would have.

SATSUMA

Op here. I wasnt giving it enough Welly!!!!

morritty

Deleted User wrote: »

a diesel will usually have a bit of torque that will move the car forward at a walking pace if you let the clutch off easy. a petrol, in my experience, wont

I've only owned petrol cars. They've all done this perfectly fine

Pelvis

morritty wrote: »

I've only owned petrol cars. They've all done this perfectly fine

Yep, every car I've driven has done this. And I've driven some **** cars.

garv123

used to have a 1.3 diesel astra, the yoke would nearly stall taking off downhill if you didnt give it plenty welly!
Dead as a maggot at low rpm

H3llR4iser

Duckjob wrote: »

This. With no input from the accelerator, my 1.9 diesel can in happily lug itself in 2nd gear up the steepish ramps between levels in multi story car parks . Havent tried it in a petrol but I'm pretty sure it wouldnt happen.

This was valid about 20 years ago, relatively modern petrol engines will behave more or less in the same way - the ECU will compensate for the lack of throttle on the driver's part, unless you absolutely drop the clutch like an excited caveman; A situation that would snuff most diesel engines as well, anyway.

My petrol 159 can do exactly the same as you describe - I can start and climb two steep (about 10% gradient, perhaps more) without touching the pedal and even going into 2nd between the two ramps. You can literally feel the car lurch a bit forward as the ECU pumping more fuel on its own accord, when the engine needs it. It DOES have drive-by-wire, to be fair...but then again, anything built in the last 10-ish years will.

Leonard Hofstadter

On the contrary petrols will pull away with just the clutch unless it's a moderate hill or more. Diesels need a bit of revs so the turbo has spooled up. It's one of the many reasons I prefer petrols, they're much easier to drive in traffic. They also have lighter clutches and slicker gearboxes so driving a manual is a much nicer experience in a petrol than in a diesel.

Mech1

Im a professional mechanic, drive loads of different cars every day and often dont know what engine is installed, the small modern diesels often catch me out by stalling on 1st attempt at lifting clutch.

More revs needed.

Farfromhome02

Every car Van Truck or Bus will be different when
it comes to getting it to move of,obviously when empty and loaded you will need to adapt your clutch and accelerator control
Diesel will always need to be given more beans to move,easier to stall
Will become routine after a week with new car

galwaytt

Mech1 wrote: »

Im a professional mechanic, drive loads of different cars every day and often dont know what engine is installed, the small modern diesels often catch me out by stalling on 1st attempt at lifting clutch.

More revs needed.

I was driving something new lately, and for the life of me can't remember what it was, but, in gear, clutch pressed it ticked over at xxx rpm. Then as soon as you moved the clutch, without pressing the accelerator at all, the rpm rose slightly: I reckoned this was an anti-stall feature.

[EDIT] remembered what it was: new Renault Trafic [/EDIT]

fletch

Leonard Hofstadter wrote: »

On the contrary petrols will pull away with just the clutch unless it's a moderate hill or more. Diesels need a bit of revs so the turbo has spooled up.

It's funny, my experience was always the opposite. In my old 1.9tdi, I could lift the clutch really fast without touching the accelerator and it would pull away no problem. When I'd get back into a petrol car, it would always nearly cut out if I tried the same thing.

Burning Eclipse

Leonard Hofstadter wrote: »

On the contrary petrols will pull away with just the clutch unless it's a moderate hill or more. Diesels need a bit of revs so the turbo has spooled up. It's one of the many reasons I prefer petrols, they're much easier to drive in traffic. They also have lighter clutches and slicker gearboxes so driving a manual is a much nicer experience in a petrol than in a diesel.

fletch wrote: »

It's funny, my experience was always the opposite. In my old 1.9tdi, I could lift the clutch really fast without touching the accelerator and it would pull away no problem. When I'd get back into a petrol car, it would always nearly cut out if I tried the same thing.

I've had the same experiences as fletch, exclusively, so now I'm really interested to see what cars were talking about.

I drove a 316i that would never do this, then a 1.8d Mondeo that always would. Current car is an auto, so no fear there. I do prefer petrol though, no question.

corsav6

garv123 wrote: »

used to have a 1.3 diesel astra, the yoke would nearly stall taking off downhill if you didnt give it plenty welly!
Dead as a maggot at low rpm

I've had a few 1.3 diesels and they all had enough torque to pull away without acceleration. I have a van now with that engine and it easily climbs the steep hill out of our house in 1st without accelerator.
I'd say you had an issue, maybe a slightly leaking egr valve which can suck the power below 1500rpm.

ELM327

With a diesel you need to floor it then release the clutch.
Different beast to a petrol engine altogether.

colm_mcm

Some diesels give it a bit of throttle for you when you lift the clutch near biting point. Great craic when you’re at a pedestrian crossing and just about to go, makes it sound like you’re impatient!

The reason for wafer thin torque of many diesels from idle is that the engine management tries to avoid visible smoke at all times. If you look at the maps from any recent system you can see that the management tries to keep the injection volume and the airmass at the smoke free zone at all costs.

This is also the reason why the modern diesels especially the ones with a single turbo feel laggy at low revs but then go like a rocket once the boost builds up. The reason why low powered diesels initially had a turbo is not there to provide power but to provide enough air so that there no visible smoke. It's the same reason why the engines are running at boost with a high exhaust back pressure almost all the time: To minimise lag in power delivery, even when you don't actually need it at that time. The second reason for the high back pressure is to facilitate the EGR to work properly but this is TMI already I think.