The Twelve Roadster is a motor car from National, with rear wheel drive, a front located engine and a roadster body style.
The 6.1 litre engine is a naturally aspirated, side valve, 12 cylinder unit that has an output of 72 bhp (73 PS/54 kW) of power.
The power is delivered to the wheels via a 3 speed manual transmission.
Full specs
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| Carrosserie | |||
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| Carrosserie | 4 seater roadster | ||
| Aantal portieren | |||
| Ontwerper | |||
| Afmetingen en gewicht | |||
| Wielbasis | 3251 | 128 | |
| Spoorbreedte voor | 1422 | 56 | |
| Spoorbreedte achter | 1422 | 56 | |
| Lengte | |||
| Breedte | |||
| Hoogte | |||
| Bodemvrijheid | |||
| Gewicht | |||
| Gewichtsverdeling | |||
| Benzinetank inhalt | |||
| Aërodynamica | |||
| Cw-waarde | |||
| Frontaal oppervlak | |||
| CdA | |||
| naturally aspirated petrol | |||
| Motor fabrikant | National | ||
| Motor nummer | |||
| Aantal cilinders | V 12 in 60° vee | ||
| Cilinderinhoud | 6.1 litre 6062 cc (369.926 cu in) |
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| Boring × Slag | 73 × 120.7 mm
2.87 × 4.75 in |
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| Boring/slag verhouding | 0.6 | ||
| Distributie | side valve (SV)
2 Kleppen per cilinder 24 Totaal aantal kleppen |
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| Vermogen | 73 PS (72 bhp) (54 kW) |
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| Max. koppel | |||
| Specific output | 8.9 kW/litre 12 ps/litre 11.9 bhp/litre 0.19 bhp/cu in |
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| Motor constructie | |||
| Smering | |||
| Compressieverhouding | |||
| Brandstofsysteem | |||
| Maximum tpm | |||
| Aantal nokkenas lagers | 3 | ||
| Afkoeling | Water | ||
| Eenheidscylinderinhoud | 505.17 cc | ||
| Aanzuiging | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Katalysator | N | ||
| Prestasies | |||
| 0-80km/h | |||
| 0-60mph | |||
| 0-100km/h | |||
| 0-160km/h | |||
| 0-400m | |||
| 0-1000m | |||
| Max. snelheid | |||
| Power-to-weight ratio | |||
| Weight-to-power ratio | |||
| Verbruik | |||
| Benzineverbruik | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/litre | |||
| UK MPG | |||
| US MPG | |||
| CO2 Emissies | |||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | |||
| CO2 Effizienz (DE) | |||
| Onderstel | |||
| Motor plaatsing | front | ||
| Motor plaatsing | longitudinal | ||
| Aandrijving | rear wheel drive | ||
| Koppelverdeling | N/A | ||
| Stuurinrichting | |||
| Aantal omwentelingen stuurwiel | |||
| Draaicirkel | |||
| Wielophanging voor | |||
| Wielophanging achter | |||
| Velgmaat voor | |||
| Velgmaat achter | |||
| Bandenmaat voor | 34 x 4½ | ||
| Bandenmaat agter | 34 x 4½ | ||
| Bremmen voor/agter | |||
| Rem diameter voor | |||
| Rem diameter agter | |||
| Braked area | |||
| Versnellingsbak | 3 speed manual | ||
| Hoogste versnelling verhouding | 1 | ||
| Achteras verhouding | |||
| Algemeen | |||
| Carfolio.com ID | 195338 | ||
| Totaal gebouwd | |||
| Bouwserie | |||
| RAC rating | 39.6 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1917 National Twelve Roadster added 2009-02-05. Last modified 2013-02-28. |
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