http://torquingcarsonline.com/2014/10/06/tech-talk-what-is-haldex/ The most recent generation of Haldex AWD has gone some way into reducing understeer, although this largely comes down to the final tuning by the manufacturers that use the system. Audi and VW, for example, have tuned the Haldex system in the S3 and Golf R to pre-empt the driver, and to be able to shift up to 100% of the torque to the rear axle temporarily – resulting in the ability to oversteer. Mercedes-Benz, however, have only tuned the Haldex in the A45 AMG to be able to send 50% of its power to the rear, resulting in a vehicle more prone to understeer – a typical Haldex trait.
As is usually the case with modern RS cars from Audi, acceleration is brutal, but handling isn't the strong point. On a track, the fun factor was clearly lacking. This is not as enjoyable as a Porsche Cayman. But the upside is that instead of a cramped sportscar, you can have a 5-seater with a decent boot.
The engine feels like it will never run out of steam. Audi told us that the RS3 would reach 200 km/h in a little under 16 seconds, which kind of means that it can keep up with supercars from a decade ago.
從上述來看, RS3 加速算強了 0~200 km/hr 16 秒, 但操控樂趣不如 Porsche 換得較 Porsche 大的空間,其時甩尾並不會是最快的賽道成積,因此我一直把 BMW M135i排除在外, 比較好奇的是 A45 vs RS3 的賽道成積與操控,不知何者勝出?
原本預期幾年後若電動渦輪量產,那就可能 2.0 做到 2.5 的扭力高原區.. 不過看 u car 裡提到 :電子機械增壓,過重而且價格昂貴,還未到量產時機 http://news.u-car.com.tw/26291.html Audi quattro GmbH總裁Heinz Peter Hollerweger表示:目前電子機械增壓器需要配備48V電力系統和鋰離子電池組,但設備過重且價格昂貴,現階段先暫時擱置;直到有更輕、更便宜的解決方案出現,才會大量的應用。