Auto Union Type B

The acrid scent of a highly volatile brew of methanol and benzole stung the air, instantly overpowered by the apocalyptic roar of sixteen cylinders detonating just inches behind the driver’s spine. In 1935, the Auto Union Type B was not merely a racing car; it was a terrifying projectile of national ambition. Building upon Ferdinand Porsche’s radical Type A from the previous year, the Type B emerged as the second brutal iteration of the infamous “Silver Arrows”, designed under the governing body’s 750 kg (1653 lbs) maximum weight formula. The regulations had been conceived with the naïve assumption that limiting overall mass would naturally restrict engine size and top speeds. Instead, German engineers utilised lightweight aerospace alloys to build immense powerplants. The Type B was tasked with utterly destroying the dominance of Alfa Romeo’s Tipo B and Maserati’s conventional front-engined machines, whilst fighting a bitter, state-sponsored civil war against the mighty Mercedes-Benz W25.

Porsche’s engineering heresy lay in his uncompromising rear-mid-engine layout. The tubular steel ladder frame chassis—with its very tubes ingeniously carrying water coolant from the front radiator to the engine—cradled a monstrous 4.9-litre (302 cu in) supercharged V16. This aluminium-block leviathan, breathing through a single Roots-type supercharger, produced a thunderous 375 bhp. It sent violent, shuddering shockwaves through a five-speed transaxle, emitting a deep, low-revving bellow that stood in stark contrast to the high-pitched shriek of Italian inline-eights. The bodywork was a teardrop of hammered aluminium, draped over a chassis that utilised a notoriously tricky swing-axle rear suspension setup alongside front trailing arms and torsion bars.

This rear geometry, combined with a severe rearward weight bias and hilariously narrow cross-ply tyres, made the Type B a tail-happy beast. Drivers sat intimately close to the steering wheel, pushed far forward in the nose, disconnected from the traditional sensory feedback of a long bonnet. They danced on the pedals in a cramped, sweltering cockpit, wrestling with immense torque that could easily break rear traction at 160 km/h (100 mph). Stopping this silver missile relied on massive, finned aluminium drum brakes, which fought a losing battle against the sheer kinetic energy of a machine capable of reaching 290 km/h (180 mph) on the long straights of Europe.

Piloting this mid-engined widowmaker required a rare blend of aristocratic bravery and delicate car control. The veteran Hans Stuck and the meticulously smooth Italian Achille Varzi were its primary tamers, though a young, fearless former motorcycle racer named Bernd Rosemeyer was just beginning to learn its dark arts. Because Rosemeyer had no prior experience with conventional front-engined grand prix cars, he was uniquely unbothered by the Auto Union’s bizarre handling characteristics. During the 1935 season, the Type B proved devastatingly fast but mechanically temperamental. Varzi showcased its supreme potential by conquering the high-speed blasts of the Tunis Grand Prix and the Coppa Acerbo. Stuck, battling fierce opposition from Rudolf Caracciola’s Mercedes-Benz, wrestled the Type B to a glorious victory at the Italian Grand Prix at Monza, cementing its status as a grand prix titan. Yet, the car was entirely unforgiving. The sudden snap-oversteer generated by the swing axles required preternatural reflexes, earning it a fearsome reputation in the paddock as a machine that demanded absolute, unyielding submission from its pilot.

Ultimately, the Type B served as the vital evolutionary bridge in the Auto Union saga. It ironed out the initial cooling and handling flaws of the Type A and laid the essential mechanical groundwork for the legendary 6.0-litre (366 cu in) Type C that would utterly dominate the 1936 season. More profoundly, this supercharged V16 monster proved that Ferdinand Porsche’s radical mid-engine layout was not merely an eccentric German experiment, but the definitive future of single-seater motorsport. It was a brilliant, dangerous blueprint that the rest of the racing world would not fully understand or adopt for another two decades.