At more than 5486mm, more than 1829mm wide and sitting on 20- or 21-inch wheels, the new Bentley Mulsanne has considerable bulk. Consequently a target for the UK-based Volkswagen AG subsidiary was to minimize weight. GKN AutoStructures, a UK-based firm that is part of the GKN group, helped. The supplier, which specializes in the design, development and manufacture of pressed steel, structural assemblies, modules and chassis, worked with Bentley to develop a new rear subframe that is better than the one on the Arnage. Along with being lighter, the new component has an increased specific stiffness ratio (the rigidity per unit mass). Measured at the wheel center, the subframe's specific stiffness ratio has improved 68 percent in the front-to-back axis and 27 percent in the side-to-side axis, compared to the Arnage.
Another advantage was the design allowed for "tool-less" production and thereby saving money. Since Bentley intends to produce approximately 1,000 units a year, fully tooled production would exceed the budget. GKN AutoStructures produces the rear, and front, sub-frames at its Telford, England.
Robert Bosch GmbH is responsible for the Mulsanne's electronic stability control while British supplier TI Automotive supplies the brake and fuel lines from its plant in Telford, England.
The large twin exhaust pipes mounted below the car's rear bumper are prominent features. The tailpipe trim is delivered by Tajco A/S, a unit of Danish-owned Tajco Group, which specializes in production of exhaust trims and bumper/fascia trim.
Bentley assembles the Mulsanne in Crewe, England. Prices in the German market start at 289,170 euros.