| SHERP ATV 2018-2018 | Offroad, other-vehicles, SHERP |
| Siata 208 CS 1952-1954 (200 CS) | coupes, open-top-cars, Siata, sports-cars |
| Siata 208 S 1953-1955 (208 Sport) | open-top-cars, Siata, sports-cars |
| Sierra Cars Echo 2023-current | buggies-atvs, electric-vehicles, SierraCars |
| Sigma TN | |
| Silk-FAW S9 2020-current | |
| Silvermine 11SR | |
| Simbol Design Lavazza GTX-R | |
| Simca 1000 1961-1978 (Simca Mille) | Abarth-Simca, sedans, Simca, sports-cars |
| Simca 1000 Coupe 1962-1971 (Simca 1200S) | coupes, Simca, sports-cars |
| Simca 1200S (Hillclimb racing) 1967-1972 | custom-builds, hillclimb-racing, racing-vehicles, Simca |
| Simone Giertz’s Tesla Truckla 2019 | custom-builds, electric-vehicles, pickup-trucks, Tesla |
| SIN R1 2015-current | coupes, SIN, sports-cars |
| Singer Motors (UK) Gazelle IIIC Saloon 1958-1963 | Rootes, Singer |
| Singer Vehicle Design Porsche 911 1989-1994 (964) | coupes, fh5-roster, Porsche, Singer-VD, sports-cars |
| Singer Vehicle Design Porsche 911 ACS | custom-builds, Offroad, Porsche, Singer-VD |
| Sintura S99 1999 | GT1-racing, racing-vehicles, Sintura |
| SKEV-1 |