From Infiniti press: The 2010 Infiniti M is offered in M35 and M45 models, each available in rear-wheel drive or with Infiniti’s advanced Intelligent All-Wheel Drive system. The Infiniti M45 and M45x AWD feature a 325-horsepower 4.5-liter V8, while the M35 and M35x AWD come equipped with a 303-horsepower 3.5-liter V6. A special Sport Package (rear-wheel drive models only) adds a higher level of sporty performance and style with an advanced Rear Active Steer system, sport-tuned suspension 19-inch wheels and tires and unique body treatments.
The 2010 M remains a showcase of Infiniti’s advanced technology, including Intelligent Cruise Control and the Lane Departure Warning (LDW) and Lane Departure Prevention (LDP) systems, an advanced Infiniti Hard Drive Navigation System with touch-screen, 9.3GB Music Box hard drive for digital music storage and playback and available XM NavTraffic® (XM® subscription required, sold separately).
The 2010 Infiniti M is again offered in V8-equipped M45 or V6-equipped M35 models. The M45 features a standard DOHC 4.5-liter V8 rated at 325 horsepower and 336 lb-ft of torque. The engine design includes titanium valves, modular cylinder heads, microfinished crankshaft, lightweight pistons and super-silent single stage cam drive chain to help optimize performance. In addition, the VK45DE V8 is outfitted with a variable length air induction system and Continuously Variable Valve Timing Control System (CVTCS) to enhance the engine’s power delivery and operation efficiency.
The M45 comes standard with an advanced 5-speed automatic transmission with manual shift mode, Downshift Rev Matching and a new Drive Sport (DS) mode, which provides better acceleration feel and a more sporting driving experience.
The Infiniti M35 offers an advanced DOHC 3.5-liter V6 rated at 303 horsepower and 262 lb-ft of torque. The engine includes aluminum-alloy block and heads and electronically controlled “drive-by-wire” throttle system. Fuel economy is rated at 17 mpg City/25 mpg Highway (M35 RWD). Two transmissions are offered with the V6 engine – a 5-speed automatic transmission with the all-wheel drive M35x and a 7-speed automatic with the rear-wheel drive M35. Both transmissions feature a manual shift mode, Downshift Rev Matching and Drive Sport (DS) mode.