Futch:
Performance figures are also very dependant on weight. And I am sure press cars are rather light on options. asphalte.ch weighted a costumer 458 at 1600 kgs DIN which is very heavy and almost 200 kgs more than the factory figure.
That puts it on par with a 997 Turbo S and given the traction advantage of the 911 I am not surprised that both cars have similar straight line performance. Having said that, the Ferrari is arguably more fun to drive on a sunny sunday morning.
Same for the 991 full options, it has been measured at 1550 kgs, over 100 kgs more than factory figures, which ultimately gives it a power weight ratio barely superior to a 997.
At the end of the day, for owners, performance figures are nice, but the pleasure comes from the grin on the face. I am sure my late 997 Turbo S was quicker than my Carrera GT from standing start, but I know which I'd rather take for driving pleasure.
Ferrari quoted 1385 kg dry weight for 458 italia optioned with race seats and forged wheels. On the other hand 1600 kg customer car is weighted with all the fluids and fuel. So saying italia weights 200 kg more than factory claim is a comparison of apple to oranges.
I put my italia on a scale on which it weighted 1470 kg with approx. 10-15 liters of fuel. My car has standard (heavier) wheels, racing seats (save about 20-25 kg), alcantara pack (lighter than leather) and has no navi, lift, JBL (all of which add extra weight) So it is normal that heavily equipped customer italia with lux. Options weights 1600 kg vs 1500 kg of, full of carbon press test cars (inside&out carbon including intake monifolds, engine bay, rear diffuser, interior trim, alcantara racing seats etc)
If you look at the latest american car magazine tests of 458, they are not tuned cars but equipped with every carbon option from the factory which alone adds 40% over the base price of the car. In those tests 458 did pretty well and is faster than the first press cars in 2010.
Especially in the recent Road&Track test of 458 vs MP4-12C vs Corvette ZR1 comparison, 458 established very good times and the cars were put on dyno to verify engine powers.
http://www.roadandtrack.com/car-reviews/car-comparison-tests/chevrolet-corvette-zr1-vs-ferrari-458-italia-vs-mclaren-mp4-12c
In Motortrend Best Drivers Car of the year 2011, italia again posted very fast times both for straight line and track.
http://www.motortrend.com/features/performance/1108_2010_ferrari_458_italia_best_drivers_car_contender/
Italia did pretty well again in EVO megatest against Mclaren-Turbo S-Noble-SLS
On the other hand, Mclaren kept delaying releasing of the MP4 several times in the past and updated the car heavily in the last 2 years to cope with Italia and finally boost additional 25 hp for MY13 cars to be faster than 458
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