The current Rover 400-Series is 4,490 mm long, 1,695 mm wide and 1,390 mm tall, on a 2,620 mm wheelbase. It has grown 12 cm longer since the 1991 400-Series.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1991–1995 | 4,370 | 1,680 | 1,400 | 2,550 | 450 | 10.2 |
| 1996–1999Current | 4,490 | 1,695 | 1,390 | 2,620 | 466 | 10.3 |
Exterior figures are manufacturer specifications for the 400-Series, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.