The current Peugeot 406 is 4,736 mm long, 1,760 mm wide and 1,460 mm tall, on a 2,700 mm wheelbase. It has grown 1 cm longer since the 1996 406.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1996–1999 | 4,725 | 1,765 | 1,397 | 2,700 | 525 | 11.4 |
| 1999–2004Current | 4,736 | 1,760 | 1,460 | 2,700 | 523 | 11.5 |
Exterior figures are manufacturer specifications for the 406, 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.