TU = technical update
2 variants of N62(successor to M62TU) Valvetronic engine; 315hp 4.4 liter version and the 355hp 4.8 liter version. N62 are mated only to 6-speed automatic tranny.
4.4 liter 4.8 liter
Power @ rpm, SAE net 315 hp @ 5400 355 hp @ 6200
Torque @ rpm 324 lb-ft @ 3600 360 lb-ft @ 3400

Bentley - Product Familiarization Pg 010-8 and 010-9

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