The current Alfa Romeo 156 is 4,441 mm long, 1,765 mm wide and 1,497 mm tall, on a 2,595 mm wheelbase. It has grown 1 cm longer since the 2000 156.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2000–2003 | 4,430 | 1,745 | 1,420 | 2,595 | 360 | 11.4 |
| 2003–2005 | 4,441 | 1,744 | 1,431 | 2,595 | 360 | 11.1 |
| 2005–2007Current | 4,441 | 1,765 | 1,497 | 2,595 | 360 | 11.0 |
The Alfa Romeo 156 offers 870 mm of rear legroom and 935 mm of rear headroom, with 1,100 mm of legroom and 960 mm of headroom up front. Rear shoulder room measures 1,490 mm across.
| Front | Rear | |
|---|---|---|
| Legroom | 1,100 mm | 870 mm |
| Headroom | 960 mm | 935 mm |
| Shoulder room | 1,460 mm | 1,490 mm |
Interior figures are the roomiest measurement (seat fully back), taken as the median across the current generation’s variants; individual trims vary.
Exterior figures are manufacturer specifications for the 156, 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.