Rather than build a new engine, Singer just sleeved down its 1.5-litre unit for the 4AC — and only built about a dozen of these prototype roadsters.
Lead trim: 4AB 1.1 SOHC four (1074 cc)
Singer Roadster1950–1953
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Nobody in Burbles has spotted a Singer Roadster yet. See one on the street, point the app at it, and the first card is yours — with your @handle permanently credited on this page.
FactRather than build a new engine, Singer just sleeved down its 1.5-litre unit for the 4AC — and only built about a dozen of these prototype roadsters.
By October 1950 the further-improved 4AB Roadster appeared (about 1,000 made, October 1950–January 1953), superficially similar but with independent front suspension by coil springs and a hybrid "hydro-mechanical" Girling brake system, a shortened bonnet and disc wheels with fixed bonnet sides, redesigned curvier fenders, and a steering box centred in the chassis to simplify building right- and left-hand-drive examples. The 4AB continued alongside the larger 4AD until January 1953. The prototype 4AC (about a dozen built) used a slightly larger 1194 cc engine, a down-sleeved version of the 1.5 litre fitted to the SM1500, part of an attempt to rationalize Singer's line-up.
Collectors Spotted in the Singer Roadster Lineage
No member has published a public street spot of the Singer Roadster yet — the First · Worldwide stamp is wide open.
Trims & Figures
2 published trims in the catalogue. A blank is a figure not recorded, not zero.
| Trim | Years | Engine | Power | Torque | 0–60 | Drive | Gearbox | MSRP |
|---|---|---|---|---|---|---|---|---|
| 4AB 1.1 SOHC four (1074 cc) | 1950–1953 | Inline-4 | — | — | — | RWD | — | — |
| 4AC prototype 1.2 SOHC four (1194 cc) | 1950–1953 | 1.2 L Inline-4 | — | — | — | RWD | — | — |
Owning one
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Owners’ builds
Nobody has claimed one yet.
Photographs
Singer's biggest, most powerful roadster, the SM 4AD, wasn't even sold to its own home market at first — for its first two years, it was export-only.
Rather than build a new engine, Singer just sleeved down its 1.5-litre unit for the 4AC — and only built about a dozen of these prototype roadsters.
Singer's update to the 1950 4A Roadster included swapping the carburettor entirely — for a gain of exactly one horsepower.
Singer's Nine Roadster quietly outgrew its own name — it launched in 1939 with a bigger 1074cc engine borrowed from the Bantam Nine, not the smaller unit the Nine badge implied.
Rivals
Same body, same money, other badges — tap any card to flip.
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