I'm not a fan of the narrow angle 6s as I worry about their durability given their history of flying apart in the Corrado. Granted that was their debut and I'm sure VW has improved it, but it's not for me.
The 3.5 liter twin turbo BMW engine is supposed to be amazing; automotive journalists say it's one of the best 6s ever made. I did get to drive an Alfa with their legendary wonderfully free-revving V6 and that was a load of fun. I've never driven a 911 though. I'd like to someday.
The 911 is a blast... its mid/rear engine over its rear drive gives the car a terrific balance... but you do tend to steer the car with the gas pedal more than the wheel on high speed turns... and I hate that shit. All you need to do when driving like that is hit some gravel, sand or water and you can eat shit big time.
The BMW 6
is great. But, again with the turbos... I would prefer the low end torque of a normally aspirated engine over the high revving lurch of a turbo. To get performance you are constantly keeping the engine revving high to maintain boost... high wear and short life...
The narrow angle 6 in the GTIs and TTs is not turbocharged.... its normally aspirated. The ones used in the 2004 and 5 GTIs and TTs are rock solid, and can fit places other 6's can not.
My Audi mechanic says their 3.2 6 is one of the most durable engines Audi fields. Far less troublesome than any of their fours. Although for reasons of meeting fuel economy standards they are focusing more on their turbo 4s.
The New TT has a mixed aluminum and steel body/frame that, with the lighter turbo 4 up front, yields some pretty impressive perfomance and a near perfect power balance spread over the AWD layout. It compares favorably with the Cayman.
But, seriously.... engines, AWD, power and torque... all great stuff... but until you have driven a DSG equipped car... you have no idea how critical a component the transmission can be.
The DSG executes flawless shifts with engine revs perfectly matched going up or down, in less than a tenth of a second.
Its drive by wire, the throttle, speed, g forces and load on each drive shaft are factored into the shifting schedule to determine the ideal shift. But the computer controls the actual fuel to the engine...
Slipped into Sport mode, the DSG delays upshifts to the very edge of the redline, and downshifts to keep engine revs over 2800 in the sweet spot of the power band....
If, for any reason, I am unhappy with any gear the computer has chosen, A tap on the paddle shifter puts the car into the gear I want in a tenth of a second, automatically blipping the throttle to match engine revs and maintain power.
I can floor the gas pedal and you can not even FEEL the car shift thru all 6 gears in less than 5 seconds. continuous uninterrupted power.
And yet in normal driving, the DSG tries to keep engine revs as low as possible to maximize fuel economy. I get a solid 26 on the highway.
I CAN'T blow up this engine because the DSG, even in manual mode, will perform protective shifts, keeping the engine at or below redline, and absolutely preventing the engine from being in a gear that would lug.
The result is a car tuned to run right at its limits, but prevent you from damaging it in the throes of enthusiasm.
I have beat far faster cars in a straight line peel simply because they actually DO pEEEEL- liquifying rear tires rather than actually accelerating... or, more commonly, because no matter how slick a short throw they think they have mastered, they simply can not shift as perfectly as the DSG can in Sport mode.
But where it really matters is in the twists and turns of rally driving. In sport mode the DSG perfectly keeps the engine in the powerband without any attention from me, the EPS system keeps the car straight and pointed where you want it to go, and all I have to focus on is the steering, and braking.
That lack of distraction, that certainty that I will never over-rev nor lug the engine at any point... that flawlessness in perfomance makes me look like a far better driver than I really am.
And it protects the running gear of the car from being overtaxed.
DSG rules... Porsche knows it... that's why they are switching over.
And BMW and Mercedes knows it too... they have discontinued their SMG systems to develop their own dual clutch servo.
Seriously, TRY one, if you like turbos, and like the utility of the forester...I suggest test driving an Audi S3 with the 2.0T direct injection engine and the DSG.