The current Alfa Romeo 145 is 4,061 mm long, 1,712 mm wide and 1,429 mm tall, on a 2,540 mm wheelbase.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1994–1999 | 4,093 | 1,712 | 1,429 | 2,540 | 320 | 10.5 |
| 1999–2000Current | 4,061 | 1,712 | 1,429 | 2,540 | 320 | 10.5 |
Exterior figures are manufacturer specifications for the 145, 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.