The Ferrari 290 MM was a Ferrari race car produced in 1956. It was developed to compete in the 1956 edition of Mille Miglia, hence the acronym "MM", and was produced in four units.
The engine was a V12 at 60°, derived from the 4.5-litre unit which was then used in Ferrari's Formula One cars. Displacement was 3,490 cc (213 cu in), for a maximum power of some 320 HP at 7200 rpm, and a maximum speed of 280 kilometres per hour (170 mph).
The car won the 1956 Mille Miglia, raced by Eugenio Castellotti, while another 290 MM, driven by Juan Manuel Fangio, finished fourth. Phil Hill and Maurice Trintignant also won the Swedish Grand Prix of that year, granting Ferrari the overall victory in the World Sportscar Championship. The following year a 290 MM won the 1000 km Buenos Aires.
On December 10, 2015, RM Sotheby's sold a 1956 Ferrari 290 MM at auction for $28,050,000 — the highest price for a car sold in 2015 and the third most expensive ever.