The Lexus LFA's most revealing instrument is not its exhaust but its tachometer. The exhaust gets attention. In a city, its V10 can send a sharp, rising note between buildings; inside, a digital display tracks an engine that Lexus said could climb from idle to its 9000 rpm redline in just 0.6 seconds.The speed of that climb explains the dashboard choice. A conventional analog needle has moving mas...More