Mechanically, the car is identical to Birkin’s original, save for two safety-critical features – modern electric fuel pumps, and a foam baffle to the fuel tank. A donator, a reworked alternative to the original dynamo has also been added, offering a more powerful and reliable charging system whilst retaining the look of the original dynamo. The engine is a brand new example of W.O. Bentley’s own 4½-litre design, featuring aluminum pistons, an overhead camshaft, four valves per cylinder, and twin spark plugs. Attached to the front is the iconic supercharger that gives the Blower its name, and is an exact recreation of that created in the 1920s by renowned engineer, Amherst Villiers. Power has been measured as part of engine sign-off, with the near-100-year old design reliably making 240 bhp.
