Between 1933 and 1934, MG produced a limited run of 33 supercharged six-cylinder competition cars. These vehicles were essentially race-ready, built on the MG K-series Magnette chassis, and were designated as K3 models, following the K1 and K2 production Magnettes.
The K3 Magnettes hold a significant place in MG’s racing history. In their debut, three K3 works cars won the team prize at the 1933 Mille Miglia, reaching speeds up to 110mph. The K3’s most notable victory came when famed Italian driver Tazio Nuvolari won the Ulster Tourist Trials.
The K3, with a 94.5″ wheelbase, was powered by a supercharged 1,066cc SOHC six-cylinder engine. With the high-boost blower mounted ahead of the radiator, it could generate 120bhp at 6500 RPM. Standard features included a Wilson Pre-Selector transmission, allowing pre-set gear changes, and large single cross-shaft four-wheel mechanical brakes, operated by Bowden cables.
Photos by Tom Wood Courtesy of RM Sotheby’s
