Photo: BMW 6 Series by Dinkun Chen, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
BMW · model year 2005
2005 BMW 645ci Convertible
Subcompact · Rear-Wheel Drive · Gas · EPA class: Subcompact Cars
EPA figures · 2005fueleconomy.gov
16MPG combined
13/21MPG city / highway
$5,150fuel a year
555 g CO₂ per mile 4.4 L 8-cyl Automatic (S6)
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 16 MPG
- City MPG
- 13 MPG
- Highway MPG
- 21 MPG
- Annual fuel cost
- $5,150
- Tailpipe CO₂
- 555 g per mile
- Model year
- 2005
- Body
- Car
- EPA size class
- Subcompact Cars
- Drive
- Rear-Wheel Drive
- Engine
- 4.4 L 8-cyl
- Transmission
- Automatic (S6)
- Fuel
- Gasoline
Efficiency
Running cost
The car
Powertrain
More BMW model years
2005 BMW 545i
17 MPG · $4,850 fuel a year 2005 BMW 645ci
18 MPG · $4,550 fuel a year 2005 BMW 645ci
19 MPG · $4,350 fuel a year 2005 BMW 645ci
17 MPG · $4,850 fuel a year 2005 BMW 645ci Convertible
16 MPG · $5,150 fuel a year 2005 BMW 645ci Convertible
19 MPG · $4,350 fuel a year
2005 BMW 745i
19 MPG · $4,350 fuel a year