| SHERP ATV 2018-2018 | SHERP |
| Siata 208 CS 1952-1954 (200 CS) | coupes, Siata |
| Sierra Cars ALPHA | racing-vehicles, SierraCars |
| Sierra Cars RX3 | racing-vehicles, rally-racing, SierraCars |
| Simca 1000 1961-1978 (Simca Mille) | Abarth-Simca, sedans, Simca, sports-cars |
| Simca 1000 Coupe 1962-1971 (Simca 1200S) | coupes, Simca, sports-cars |
| Simca 1100 1967-1985 | Dodge, hatchbacks, Simca, Talbot, wagons |
| Simca-Gordini Type 15 1947-1953 | Formula1-racing, Gordini, open-wheels, racing-vehicles, Simca |
| Simtek F1 models 1994-1995 (S941/S951) | Formula1-racing, open-wheels, racing-vehicles, Simtek |
| SIN R1 (GT racing) 2015-2018 | GT4-racing, GT-racing, racing-vehicles, SIN |
| SIN R1 2015-current | SIN |
| Singer Motors (UK) Gazelle IIIC Saloon 1958-1963 | Rootes, Singer |
| Singer Vehicle Design Porsche 911 (964) | coupes, custom-builds, fh5-roster, Porsche, Singer-VD |
| Sintura S99 1999 | GT1-racing, racing-vehicles, Sintura |