Thread: Petrol VS diesel?

Originally Posted by DoubleChevron

That must be the most stupid things I've watched. You just pick whichever cog puts the motor in its torque band and travel at the speed it'll handle. Who runs a motor flat out near its redline to try and hold speed up a hill (especially a diesel) ................. Your waaaaaaaaaaaaaaaaaaayyyyyy out of the torque band of the motor. The diesel probably should have been hauling along at 2200rpm ... the the petrol at 3200'ish .... ie: wherever the motor makes its maximum torque value.

seeya
Shane L.

Shane I think you completely missed the point mate. For starters one is diesel the other petrol, one has forced induction the other does not, the altitude is ridiculous favoring forced induction, the idea is to push the motor to test its limits. I think it's a great test.

Originally Posted by 1nando

Shane I think you completely missed the point mate. For starters one is diesel the other petrol, one has forced induction the other does not, the altitude is ridiculous favoring forced induction, the idea is to push the motor to test its limits. I think it's a great test.

Forced induction is always going to win at altiutude. But that test is still just dumb. Reliability of operation over extended periods of time towing at its GVM matters. not how hard you can punish a car up one single hill... one single time. That is completely meaningless.

Of course a cummins diesel is going to out tow a small petrol v8 in pretty much any scenario. When V8 petrols were used in industry, they used detuned big blocks versions and were cammed so they were all "down low" torque. Take a look at the old F250's for example. They had a 460 big blocks in them. And would crawl up that climb in the slowest lane with the Citroen 2cvs ................. They would still be doing the same work today, 20years later, just as slowly and effortlessly.

seeya,
Shane L.

Originally Posted by DoubleChevron

Forced induction is always going to win at altiutude. But that test is still just dumb. Reliability of operation over extended periods of time towing at its GVM matters. not how hard you can punish a car up one single hill... one single time. That is completely meaningless.

Of course a cummins diesel is going to out tow a small petrol v8 in pretty much any scenario. When V8 petrols were used in industry, they used detuned big blocks versions and were cammed so they were all "down low" torque. Take a look at the old F250's for example. They had a 460 big blocks in them. And would crawl up that climb in the slowest lane with the Citroen 2cvs ................. They would still be doing the same work today, 20years later, just as slowly and effortlessly.

seeya,
Shane L.

You obviously did not watch it. The NA petrol trumped the Cummins diesel. Same engine in the y62

Diesel had 500 pounds more load. No petrol will enjoy being under max load towing up hills at nearly 6000rpm on a regular basis...sure fire way to destroy it. I love petrol V8's but for towing diesels are typically better in the long run where towing regularly.

Cheers

Originally Posted by ozscott

Diesel had 500 pounds more load. No petrol will enjoy being under max load towing up hills at nearly 6000rpm on a regular basis...sure fire way to destroy it. I love petrol V8's but for towing diesels are typically better in the long run where towing regularly.

Cheers

most diesels wont do 6000rpm...

Admittedly I.skipped through it but the petrol.was loaded up foot to the boards holding just under 6000rpm. Most post was ambiguous but I mean the petrol.wont like nor last doing that regularly. Cheers

Originally Posted by ozscott

Diesel had 500 pounds more load. No petrol will enjoy being under max load towing up hills at nearly 6000rpm on a regular basis...sure fire way to destroy it. I love petrol V8's but for towing diesels are typically better in the long run where towing regularly.

Cheers

Missed the point. 500 pounds is 227kg. The Cummins is a big diesel compared to the v8 diesel 200 for example (touted as Gods tow chariot in Oz) yet the petrol blew it away.

Most diesels don't make any decent power after 3500rpm and as a result have less of a gearing advantage.
The v8 did rev to 6000rpm but also sat on its peak torque band at 4400rpm often. Had he placed the gearbox into manual mode he probably could have stopped the box dropping a gear and maintained the torque band at 4400rpm and not needed to rev it out.
The fuel usage is almost the same, so much for the great fuel economy of diesels. The fuel use in the Cummins is high compared to our dual cab toy cars with toy motors cause it actually has some power.
9 minutes 45 seconds of hard work and the modern diesel couldn't outshine the NA petrol in what many here are claiming should be a easy diesel win...

Simple test, hard test, petrol passed with flying colors... excuses welcome

Simply put IF a petrol engine is such a better option for towing, longevity and economy then WHY are all the truckies driving diesel powered trucks and the Tugs in the harbour are also diesel powered???
Also good luck driving a petrol powered 4WD in the Top End during the wet through all that water