1933 MG K3 Supercharged Roadster Special  Chassis no. K0326
Lot 652
1933 MG K3 Magnette Supercharged Roadster Special Chassis no. K0326
Sold for US$ 194,000 inc. premium
Lot Details
1933 MG K3 Magnette Supercharged Roadster Special
Chassis no. K0326
During 1933-1934, MG produced a special run of 33 six-cylinder supercharged competition cars. These essentially ready-to-race cars were based on the concurrent MG K-series Magnette chassis, and as they followed the K1 and K2 production Magnettes, they were designated K3 models.

The K3 Magnettes would standout in the storied racing history of the MG Car Company. In their very first appearance, a trio of works K3s took the team prize at the 1933 Mille Miglia—after having run at up to 110mph during the race. Other significant and important victories followed, none more celebrated than when famed Italian driver Tazio Nuvolari piloted a K3 to victory at the Ulster Tourist Trials.

Large for an MG, the 94.5" wheelbase K3 was powered by a supercharged 1,066cc SOHC six-cylinder engine. With the high-boost blower mounted ahead of the radiator engaged, it could produce—and withstand—120bhp at 6500 RPM. The K3 included a Wilson Pre-Selector transmission as standard equipment; the box enabled the driver to set up anticipated gear changes ahead of time, with the device making the actual shifts when the clutch pedal was subsequently depressed. Large single cross-shaft four-wheel mechanical brakes, operated by Bowden cables, were also standard.

The offered car does not lay claim to being a factory-original K3, as the knowledgeable and well-known MG expert, Peter Gregory, built it up on a non-original chassis. It is believed to number among the first three of several K3 recreations put together by that gentleman. Up to sixty percent of the car's parts are thought to be original K3 competition components, including the supercharger unit, finned sump, magneto, steering column and smaller items such as the spare spark plug mount. The bodywork, with 'slab' fuel tank and spare to the rear, is in the style of first-year K3s; by the second year, a boat-tail body was in use.

Although completed some time ago, the K3 recreation presents well in every respect and its nicely detailed authentically supercharged engine has been fully rebuilt. The car was earlier extensively raced at vintage events in the United Kingdom, where it competed in VSSC and MGCC events and even Stirling Moss is known to have taken a turn at the wheel. The handsome MG has also been the subject of numerous magazine articles and covers.

Documented factory-built supercharged K3 roadsters are extremely rare—and exceedingly valuable—today. This recreation was assembled with exacting accuracy by a marque expert, who liberally incorporated authentic K3 competition components unlikely to ever again be available. The car promises the full MG K3 experience, in every sense, for a relatively reasonable investment.

Turned out in British Racing Green with Black fenders, and fully equipped with proper and authentic period competition gear, this proven competitor now invites a new owner to savor its supercharged performance—and even, perhaps, engage its capabilities as a participant in vintage retrospective events.
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