The current Opel Vectra is 4,611 mm long, 1,798 mm wide and 1,460 mm tall, on a 2,700 mm wheelbase. It has grown 18 cm longer since the 1988 Vectra.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1988–1995 | 4,428 | 1,700 | 1,400 | 2,600 | 516 | 10.9 |
| 1995–1999 | 4,477 | 1,707 | 1,428 | 2,640 | 500 | 10.6 |
| 1999–2002 | 4,495 | 1,707 | 1,423 | 2,637 | 500 | 10.7 |
| 2002–2005 | 4,596 | 1,798 | 1,460 | 2,700 | 500 | 10.9 |
| 2005–2009Current | 4,611 | 1,798 | 1,460 | 2,700 | 500 | 10.9 |
Exterior figures are manufacturer specifications for the Vectra, 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.