The FW08B was a six-wheeled (four driven wheels at the rear and two undriven wheels at the front) variant that originated from the FW07D (also six-wheeled). Alan Jones, Jonathan Palmer, Keke Rosberg and Jacques Laffite drove the two versions of the six wheel in tests in 1981 and 1982, but the cars never raced. Patrick Head specifically said that the reason it was banned was because “someone in a FOCA meeting said it would drive up costs and cause chaos during pitstops”. The FIA promptly limited the number of wheels for all cars to four, of which only two may be driven. The FW08B has been restored by Williams in 2010s, and was seen in action during special track days.
| Season | Series | Event |
| 1982 | F1 | Tests |
| Driver | No. | Entrant |
| Keke Rosberg | 1 | TAG Williams Team |
| Scale | Manufacturer | Collection |
| 1:43 | Minichamps | |
| Cat. No. | Quality | Rarity |
| 436820699 | 
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