The BMW 503 and its stablemate, the BMW 507, very nearly sunk the German automaker in the 1950s due to the runaway costs associated with their production. Despite the troubles the cars caused BMW, they’re remembered today as amongst the most beautiful designs produced by the marque in the 20th century.

The BMW 503 – And (Nearly) The End Of BMW

The story behind the creation of the 503 and the 507 is fascinating, the cars were intended to be priced somewhere between the luxurious Mercedes-Benz 300SL and the lower priced sports cars coming out of England like those from MG.

There’s no doubt that both cars would have fulfilled this mission if it wasn’t for the fact that costs ran far over budget, the original goal had been an MSRP of 12,000 Deutsche Marks but the final selling price was an eye-watering 29,500 DM.

BMW 503

The idea to build attractive sports cars based on the platform of the BMW 501 (and 502) four-door sedan platform belonged to BMW sales manager Hanns Grewenig. He was backed up by requests from Max Hoffman, the influential New York-based Austrian-American auto importer.

The BMW board had seen the success and positive reception enjoyed by the Mercedes 300 SL and 190 SL, and they realised that the Americans would buy German sports cars en masse despite the relative recency of WW2 and the hostilities that had existed between the two countries.

Fiedler, Loof, Hoffman, and von Goertz

Once the project was green lit, engineer Fritz Fiedler was tasked with developing two sports/GT car platforms using the pre-existing BMW 501 and 502 parts bin to help keep costs down. He developed two chassis, including one with a shorter wheelbase for the 507.

The original design sketches were penned by BMW’s Ernst Loof however when Hoffman saw them he recommended that his friend and Raymond Loewy-protege Albrecht von Goertz send his own design sketches to BMW. Albrecht followed this advice, and BMW hired him shortly thereafter. Whilst at BMW von Goertz would design both the 507 and the 503, both cars that would be acclaimed for their stunning good-looks.

BMW 503 Car Back

BMW 503 – Specifications, Engine, and Running Gear

Under the beautifully-styled body, the BMW 503 was powered by the pre-existing alloy BMW OHV V8, with a capacity of 3,168cc (193 cu in). This engine was improved over the unit used in the four-door sedans, with twin carburettors and a much improved lubrication system, now using a chain-driven oil pump.

The engine has a compression ratio of 7.5:1 and produces 140 bhp at 4800 rpm, approximately 30 hp more than the sedate version of the engine used in the sedan.

This V8 was mated to a 4-speed manual transmission sending power back to a live rear axle with torsion bar springs, front suspension was double A-arms with torsion bar springs, and braking was provided by drums on all four corners with an option to fit front discs.

The kerb weight of the 503 was a not-insignificant 1,500 kgs (3,300 lbs), the additional power produced by the upgraded engine was enough to propel the car to a top speed of 115 mph – a heady figure in the 1950s.

BMW 503 V8 Engine

The BMW 503 Shown Here

The car you see here has known ownership history from new with extensive documentation, it’s fitted with desirable front disc brakes, and it retains its factory original interior and date coded wheels.

Just 273 examples of the BMW 503 coupe were built, and only two of those were fitted with the rear jump seat featured on this car. It has history file, service records, and rare factory owner’s manual, and it’s listed as being in exceptional condition throughout.

If you’d like to read more about this 503 or register to bid you can click here to visit the listing on RM Sotheby’s.

BMW 503 Steering Wheel

BMW 503 Rear Seat

BMW 503 Front End

BMW 503 Interior

BMW 503 Side

Images: Jasen Delgado ©2019 Courtesy of RM Auctions

Founder & Senior Editor Silodrome

Ben Branch has had his work featured on CNN, Popular Mechanics, the official Smithsonian Magazine, Road & Track Magazine, the official Pinterest blog, the official eBay Motors blog, BuzzFeed, and many more.

Silodrome was founded by Ben back in 2010, in the years since the site has grown to become a world leader in the alternative and vintage motoring sector, with millions of readers around the world and hundreds of thousands of followers on social media.

Published by Ben Branch -