period. Competition performance Between 1927 and 1931 the Bentley 4½ Litre competed in several competitions, primarily the 24 Hours of Le Mans. The first was the Old Mother Gun at the 1927 24 Hours of Le Mans, driven as a prototype before production. Favored to win, it instead crashed and did not finish. Its performance was sufficient for Bentley to decide to start production and deliver the first models the same year. Far from being the most powerful in the competitions, the 4½ Litre of Woolf Barnato and Bernard Rubin, raced neck and neck against Charles Weymann's Stutz Blackhawk DV16, setting a new record average speed of ; Tim Birkin and Jean Chassagne finished fifth. The next year, three 4½ Litres finished second, third, and fourth behind another Bentley, the Speed Six, which possessed two more cylinders. The naturally aspirated 4½ Litre was noted for its good reliability. The supercharged models were not; the two Blower models entered in the 1930 24 Hours of Le Mans by Dorothy Paget, one of which was co-driven by Tim Birkin, did not complete the race. In 1930, Birkin finished second in the French Grand Prix at the Circuit de Pau behind a Bugatti Type 35. Ettore Bugatti, annoyed by the performance of Bentley, called the 4½ Litre the "fastest lorry in the world." The Type 35 is much lighter and consumes much less petrol. Blower Bentleys consume 4 liters per minute at full speed. Despite the Blower's record of poor reliability, Mildred Bruce, a British female racer, achieved a 24-hour distance record at Montlhéry in one, attaining an average speed of . In 1930, the Daily Herald offered a trophy for the fastest driver at an event at Brooklands. The first year, Tim Birkin and Kaye Don competed and Kaye Don won with a speed of . In 1932, Tim Birkin won driving his red Blower "Monoposto," clocking . End of production In November 1931, after selling 720 copies of the 4½ Litre - 655 naturally aspirated and 55 supercharged - in three different models (Tourer, Drophead Coupé and Sporting Four Seater), Bentley was forced to sell his company to Rolls-Royce for £125,175, a victim of the recession that hit Europe following the Wall Street Crash of 1929. Current status , Bentley 4½ Litre automobiles from this inter-war period – the "Belle Époque" of the automobile for some – sold for around €1,000,000.