Infiniti has announced plans to add a hybrid to the M line for the 2012 model year. In what will be Infiniti’s first production hybrid vehicle, the M35 Hybrid will be based on the redesigned 2011 M, and it will join the M37 and M56 six- and eight-cylinder models. Infiniti’s entry into the hybrid market will help the company better compete against Lexus in the premium hybrid market, as well as bolster the company’s green image

The hybrid system will use a twin clutch installed between the naturally aspirated 3.5-liter V6 engine and single electric motor. The battery pack is a laminated lithium-ion design that Infiniti claims will offer twice the power as a same-sized, traditional Nickel-Metal-Hydride pack. Nissan is hedging its bets on Li-Ion technology with its partnership with NEC, the Renault-Nissan agreement with Better Place, and the upcoming Nissan Leaf pure EV. Details on driving range and performance will be announced closer to its on-sale date.

The current M is one of our top-rated luxury sedans with a powerful engine, agile handling and comfortable ride. We look forward to testing the redesigned 2011 model when it goes on sale in the spring of 2010. The M35 hybrid will hit dealerships a year later.

—Liza Barth