Reliable consistent street power vs. Turbo. It's your choice, if GM would let you have it.
Fact, normally aspirated engines are more reliable then forced induction engines! Turbos are like a small runaway nuclear explosion. Without a wastgate, if you keep your foot all the way to the floorboard, the turbo would build so much pressure up in your engine that you would blow your engine up. Something happen to the wastgate and your engine is toast.
Why does LNF power peak at 260HP and 5,300 rpm? I’ll tell you why, the LNF uses the same little K04 variant of the German built 3K-Warner Turbo as the award winning Audi 2.0L Turbo does.
The K04 is designed to provide reliable, long-term service as long as its performance parameters are not exceeded. Driving the car at engine speeds above 5800 rpm with 15spi or greater boost significantly increases the exhaust temperature measured inside the K04 turbine housing. This signals that the maximum efficiency of the turbocharger has been exceeded, and that the energy produced by the turbine housing is now converting to heat rather than accelerating the compressor wheel faster. Unless a careful and extended idle-down is performed at the end of every hard driving session, the rapid heat build-up from high boost/high rpm operation causes the turbine shaft to soften, and allows the inconel turbine head to droop. The result is an imbalance that ultimately leads to a shaft failure.
Audi obviously wants happy customers and so to make their engines last keeps boost pressure lower then LNF, and limits boost pressure to 8psi maximum. GM has 5yr./100,000 warranty so who cares. That’s why Audi is profitable and GM is not.
As far as power goes, Audi hears you loud and clear. 2009 will bring a 350HP 2.5L 5-cylinder Turbo and the VR6 is upped to 3.6L with 280HP for its TT.
Spied: 2010 Audi TT-RS Roadster
As far as Audi and BMW is concerned, it is clear that BMW is arrogant. If rear wheel drive is superior then why does BMW offer AWD xi models now? Maybe it’s because Audi is starting to smoke them in sales too?
BMW vs. Audi in a war of words
The N/A A4 is equivalent to the N/A BMW 328 as the N/A S4 is equivalent to the TT BMW 335 as the RS4 is equivalent to the BMW M3. So comparing apples to apples,Audi is the better car.
P.S.: When is GM coming out with their 300HP LNF upgrade?