The BMW M5 sedan is the hot ticket for the enthusiast driver who needs a four-door sedan but wants performance on the far side of legal speeds, is comfortable with cutting-edge technology, and doesn't mind low fuel efficiency. Based on the 5 Series chassis with distinctive air-cheating body panels, the M5 is powered by BMW's 500 horsepower V10 engine capable of zero to 60 mph in 4.5 seconds, with a variety of high-tech gizmos controlling power, shifting and handling.

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The core of the M5 is the most powerful engine in BMW's line-up, a five-liter V10 based on BMW's F1 engine, producing 500 horsepower and 383 pound-feet of torque. As with most other high-performance luxury sedans, fuel efficiency is the trade-off for this level of power with the V10 rated at 17 mph on the highway and only 11 mpg in city driving.

Power is transmitted to the rear wheels through an equally innovative 7-speed sequential manual gear box that uses Formula 1 technology to shift much faster than would be possible with a manual gear box. Unfortunately, most reviewers have found this first-generation SMG to be clunky under normal driving conditions, so most still prefer the no-cost optional six-speed manual transmission.

The BMW M Drive system allows the M5 owner electronically to select the level of damping desired (comfort, normal, and sport), with electronic steering assistance tied to damper setting. In addition, the system allows selection of three levels of engine power and throttle response, several shift-program settings on the SMG gearbox, and variable dynamic stability control settings.

Built on the 5 Series chassis, the car is fitted with a distinctive front spoiler and air intake, side gills, and unique rocker panels, and rides on 19-inch alloy wheels with Z-rated 255mm front and 285 mm rear tires.

Interior fitting options include heated M sport front seats, extended leather upholstery, and brushed aluminum accents. The M is also equipped with a unique gauge cluster to set it apart from the standard 5 Series. The Premium Sound audio system uses 16-high-performance loudspeakers, with a full range of input sources.

Commensurate with its performance, the M5 has a full complement of safety features, including BMW's largest brakes with drilled, ventilated brake rotors, 2-stage Smart Airbags, and standard front-seat side-impact air bags with front and rear head protection system, and optional rear-seat side-impact air bags, and BMW Assist in-car telematics system for four years.