A new version was introduced in 2006 called the Mercedes-Benz SLR McLaren 722 Edition. The "722" refers to the victory by Stirling Moss and his co-driver Denis Jenkinson in a Mercedes-Benz 300 SLR with the starting number 722 (indicating a start time of 7:22 a.m.) at the Mille Miglia in 1955.
The "722 Edition" includes an engine rated 650 PS (480 kW; 640 hp)@6500rpm and 820 N·m (600 lb·ft)@4000rpm, with top speed of 337 km/h (209 mph) (3 km/h (1.9 mph) faster than the standard SLR). 19-inch light-alloy wheels were used to reduce unsprung weight, while modifications were also made to the suspension, with a stiffer damper setup and 10 mm (0.39 in) lower ride height introduced for improved handling. Larger 390 mm (15 in) diameter front brakes and a revised front air dam and rear diffuser were fitted.
Exterior changes, other than the larger 19-inch (480 mm) black light-alloy wheels, include red "722" badging, hearkening back to the original 722 racer, and slightly different taillights and headlamps.
The SLR 722 can go from 0 to 100 km/h (62 mph) in 3.6 seconds, 200 km/h (120 mph) in 10.2 seconds and 300 km/h (190 mph) in 21.4 seconds and can reach a top speed of 337 km/h (209 mph).
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