noone1:
Turbos are about economics. Far lower development costs since the same engine can be spread across a bunch of models, more or less, and they can very easily adjust boost for whatever performance they want. No need to work hard and spend so much time and money massaging an extra 50 hp out of an NA engine when you can just change a couple parameters in code and use it for 10 years in 4 cars.
Sounds easy but it isn't. The increased torque creates huge problems for the drivetrain and gearbox, also the tires and the ESP, steering and so on. In the past, the drivetrain/gearbox had a high reserve in the upper range (remember the 993/996 and the Mezger engines?). Later on, manufacturers went cost effective. Meaning: The drivetrain/gearbox are exactly made for the current power/torque with a small margin to the upper side for a facelift or tolerances. With the next facelift or next generation, the parts will be improved to withstand higher torque. The modern engines don't have much reserve to the upper side. The new Audi R8 is no different: The old cars (first gen with V10) could be easily upgraded with a software mod to 50-80 hp more, no kidding. Quite amazing for a n/a engine but Audi artificially actually limited power in these engines, this is why. For example the throttle valve didn't fully open. On the new generation, only the 540 hp version V10 is artificially limited (same engine number as V10 Plus but software limits power), the 610 hp engine version is "open" and to achieve more power, you need to change the exhaust system and the intake, also some minor engine parts (titan valves, etc.), the new Huracan Performante is the best example. 30 hp more only, the V10 engine is currently at it's power limit. To increase power, it would require lots of internal mods, maybe incl. a displacement increase. Not worth it for Audi/Lamborghini.
Also, NA engines can only put out so much power. No way you're getting 488 performance from the 458 V8. Just not going to happen.
True. I am pretty sure that the 488 engine is good for at least 750 hp in it's current technical state and it's most advanced setup. The old V8 in the 458 was at it's power zenith with the Speciale. Maybe a few horses more and the engine would have been done.
N/a engines are a dying breed but I am pretty sure that some will stay for a while, maybe even supported by hybrid tech. In the end however, ELV sportscars will take over. It is just a matter of time but I still believe that it won't happen very soon. Sportscar manufacturers will however put an ELV on the market each at some point, at least to prove their competence. Won't be cheap for them in the beginning.
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RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)