[rahul_intlad]

We hear of some or the other upgradation in Diesel engine technology.

First it was crdi,now crdi VGT and I am told shortly we will have CRDI VGT+ VTEC[basically variable valve timing for diesels too].But what about petrol engines after the i-VTEC[intelligent]/VVTi/VANOS...etc what are the latest innovations on the petrol front[any manufacturer any part of the world].

[v1p3r]

Direct injection would be top of the list. VGT also finds applications on petrol cars. Displacement on demand/variable displacement is another option. But it's all going to be hybrid soon anyway.

[Mpower]

Load control without use of a throttle is the next big thing.

BMW calls is Valvetronic, others will follow suit.

Next step is HCCI, but is almost like a diesel.

[theMAG]

Irrespective of what names any advancement in petrol engine technology will be called, advancements in petrol engines will be governed by only the following 2 goals:

1. Stretching the petrobuck. Making them as frugal as diesel engines
2. Increasing output figures using ever lower quantities of petrol

Both of these have an understated common fabric running thru them - cleaner exhausts

[rahul_intlad]

Just read this feature in an automobile supplement[auto mania],proclaiming the end of the road for petrol engines.They have said that in case of Hyundai verna,Mercedes benz e-class,skoda laura customers prefer the diesel engines more than the petrol engines purely on the basis of performance of the diesel engine.The last revolution in petrol engines was thirty years ago with direct injection while with diesel technology is growing leaps and bounds by the day.

Is it not wrong to completely write off the petrol engines?

Dont the diesel engines [crdi] suffer from turbolag.[I Dont know of supercharged crdi engines,and what effect would it have on FE]
Also diesels require longer idling at startup and while stopping the engine[due to the turbocharger].Also the high premium the diesel counterparts command over their the petrol engines negates the benefit of the higher FE figures for most consumers.Isn't Redlining a petrol engine more fun than a diesel.What about maintainance issues,all this electronic circuitary has made the diesel engine quite delicate if nothing else.[requires good Fuel quality,repairs costly etc]

[Steeroid]

Originally Posted by rahul_intlad

.The last revolution in petrol engines was thirty years ago with direct injection while with diesel technology is growing leaps and bounds by the day.

That is a very sweeping statement to make - whoever made it.

If it werent for the price differential between Petrol and Diesel, how many of us would even be looking at Diesel as an option for personal transport?

Lets not get carried away - diesel torque is amazing, but it comes at a cost. We're willing to bear that cost because the fuel is cheaper and it tends to take us for a few miles more anyway.

[abhibh]

Well this question was popping in my mind too..

Verna CRDi out performs petrol in almost all respect's. Am i right ?

If yes why don't they use CRDi's in rallies rather that turbo charged petrols.

Second question is that if we take swift petrol has around 130 NM torque ands producing 87BHP where as swift diesel is 190 NM and producing 75 BHP. Can't they just make increase the petrol engine torque just as diesel counterpart. That would be beneficial ain't it ?

Third question is if these Skodas, Vernas, Swifts diesel counterparts are so good in 0-100 figures why don't people still use EVO's for DRAG's ?

[Sankar]

Originally Posted by abhibh

Well this question was popping in my mind too..

Verna CRDi out performs petrol in almost all respect's. Am i right ?

If yes why don't they use CRDi's in rallies rather that turbo charged petrols.

Second question is that if we take swift petrol has around 130 NM torque ands producing 87BHP where as swift diesel is 190 NM and producing 75 BHP. Can't they just make increase the petrol engine torque just as diesel counterpart. That would be beneficial ain't it ?

Third question is if these Skodas, Vernas, Swifts diesel counterparts are so good in 0-100 figures why don't people still use EVO's for DRAG's ?

The Diesel crdi vehicles need a turbo charger to match the performance of it's normally aspirated petrol counterparts. Imagine how much BHP/torque would the petrol engines make if they're also turboed.

Which would make more power 1.3liter turboed Petrol Swift or the already turboed Diesel Swift?