Singer's first tri-car was the Tri-Voiturette.  It was powered by a 2+1⁄2hp (1.9 kW) engine, and offered in two models, the No. 1 (passenger facing backward) and No. 2 (passenger facing forward); both fitted the passenger seat well behind the rear axle.

At the 1902 Cordingly Show, at the Islington Agricultural Hall, Singer showed two commercial variants of the Tri-Voiturette, the Motor Carrier, one for tradesmen, one for dairymen.

The Tri-Voiturette was replaced by another tri-car, which had two front wheels and a driven rear, more horsepower, and a coach-built body, but with the passenger now in front of the driver.

Muriel Hind drove a Singer Tri-car in the 1906 Land's End to John O'Groats Trial, with aviation pioneer Hilda Hewlett as her passenger and mechanic.  She also drove a tri-car in the twenty four hour London to Edinburgh Trial, again with a female passenger, making good time in torrential rain.

Singer made their first four-wheel car in 1905.  It was designed by Scottish engineer Alexander Craig and was a variant of a design he had done for Lea-Francis having a 2-cylinder 1,853 or 2,471 cc (113.1 or 150.8 cu in) engine.

The first Singer-designed car was the 4-cylinder 2.4-litre 12/14 of 1906.  The engine was bought in from Aster.