The Mercury Grand Marquis is a classic large car design. It is rear-wheel drive, features a large trunk of 20.6 cubic feet and seats six via front and rear bench seats. Durability is the key value here--a venerable design, the Grand Marquis is built on a platform on which Ford builds the Police Interceptor and the LINCOLN Town Car. The model's standard 4.6L V8 has been a long-time powerplant in the Ford/Mercury fleet for many years, and makes 224 horsepower and 24 mpg on the highway.