Diesel Engine Day 2025 is on Sunday, February 23, 2025: wat makes the difference between petrol & diesel engine car's maintanence ?

Sunday, February 23, 2025 is Diesel Engine Day 2025. 1103Dp Duramax Diesel Day 1300Hp Banks Crate Engine Photo 4 1103Dp Duramax Diesel Day

Diesel engines are basically work horses and hence they demand mantaince, the usage of diesel is more when compared to Petrol. The ROI depends on the kind of usage you do with Diesel engine as the investment is more compared to petrol. Buy a diesel only if your daily commute is more then 50 kms a day or more then 1500 kms a month. There is a little bit of math involved based on the fuel consumption, mantaince cost and the purchase price of the car.

Petrol vs diesel data?

diesel engines and petrol engines simply uses the same hydrocarbons as fuel... for now a days, may engines uses biodiesel as fuel which came from plant extracts/sources... petroleum is non-renewable source of energy/fuel...

Petrol v diesel? .......................?

Can a modified turbo-diesel Golf really challenge the pace of a petrol engine version?

We took a pair of tweaked Mk4s to the test track to find out

Words: Peter Knivett Photography: Jakob Ebrey /John Colic

Ice blast - low temperatures on test day didn't help traction, but the diesel Golf still recorded some storming sprint times

Petrol versus turbo-diesel Golfs - which is quicker?

It's a question that's been bugging us on The Golf+ magazine, and with good reason, because Wolfburg's oil-burners have been getting increasingly pacey, to the level where they should be nip and tuck in the performance stakes with their petrol drinking cousins.

In the early days diesel Golfs were boring, smoky and slow, but the real turning point was the introduction of the Pumpe Duse engine with the Mk4 Golf. This new high pressure diesel pump technology was a breakthrough as it allowed the use of a new style of injector, one that could be machined to tighter tolerances, which allowed for finer fuel atomisation. That in turn meant a better, more complete `burn' within the combustion chamber, which allowed VW for the first time to throw more fuel into the engine while avoiding the dreaded soot. More fuel meant that the engines could run more turbo boost to unleash more power. so as the technology was perfected, Golf Mk4 TD power outputs climbed from 115, to 130, then 150bhp. In comparison the Mk4 petrol engined Golfs also became more powerful than their predecessors, boasting 150bhp in base 1.8T guise, then reaching 180bhp in the later GTI versions.

So while the petrol engined cars grabbed the headlines with their horsepower figures, not only were the diesels catching up in the horsepower league, but they had a real ace up their sleeves - torque. Always the trump card of turbo-diesel engines, torque has unfortunately always been the poor cousin in the glamour stakes to horsepower.

People tend to forget that it's torque and not brake horsepower that actually accelerates a car.

Understanding the difference between the two can be a tad tricky. Concepts like twisting forces, motions and radii enter the picture, which can seem like a GCSE Physics lesson.

Our man Peter folds his legs behind the wheel of the Allard diesel Mk4.

But don't switch off - I've always found it best to explain the difference between the two forces like this - if BHP is a measure of how much work an engine will ultimately do, then torque is a measure of how quickly it gets that work done.

So an engine with loads of torque and no horsepower will tend to accelerate really quickly but quickly run out of urge as the revs climb, which will hamper top speed, but give great flexibility. Whereas an engine with stacks of horses but no torque will be inflexible - great when it's wound up, on song, but limp and lifeless at lower revs. In practice that could mean a good 0-60mph and top speed time, but poor in-gear acceleration. For fast road use, the best engines produce almost even amounts of horsepower and torque, to give you flexibility and outright performance. The question is, which type of Golf engine is going to offer the best combination - internal combustion or compression ignition?

To settle the question once and for all, we set up a petrol versus diesel showdown, between a pair of tweaked MK4s that offered similar performance on paper. In the petrol corner we have Nick Lormor's tidy Jabbasport-tweaked Mk4 GTI, meanwhile in the turbo diesel corner we have Lloyd Allard, wheeling an Allard Turbosport tweaked 1.9-litre PD130 into the battle. Both are boasting over 200bhp, achieved in very different ways, with very different engines, but would the petrol engine's superior horsepower kick sand in the face of the oil-burner? Or would the turbo-diesel's extra torque sucker-punch the mighty 1.8T motor? Our super-accurate

GPS timing gear would give our contenders no place to hide, so without further ado we left the comfort of Bruntingthorpe's canteen and headed out onto the freezing trackside.

Petrol dreams: Jabbasport Mk4 1.8T GTI

In grip terms these would be challenging conditions to lay down some decent 0-60mph and standing quarter times, but that would only be part of the challenge.

Living in congested Britain, the opportunity for flat out blasts is becoming increasingly limited, which means that increasingly, manufacturers and tuners need to concentrate on real-world performance. 'Real-world' sounds dull, but it isn't, because this means focusing on in-gear acceleration times - the kind of performance you need to squirt past that lorry or tractor without having to change down two or three gears to get things moving. Bearing that in mind, a crucial part of our test would assess the third and fourth gear acceleration times.

Nick Lormor's drive-by-wire 2001 car rolled out of the factory with 150bhp, but seeing as Nick's a full-time employee at ace VAG tuners Jabbasport, it's hardly a surprise that now it's packing