Quick answer
The 2005 BMW 645Ci, the latest model year on record, is 189.8″ long, 73.2″ wide and 53.9″ tall on a 109.1″ wheelbase, and weighs 3,990 lb. At 15.8 ft it fits a standard garage and leaves 2.2 ft spare in an 18-foot street space.
Every BMW 645Ci generation, measured
| Generation | Length | Width | Height | Wheelbase | Curb weight |
|---|---|---|---|---|---|
| 2004–2005 | 189.8″ | 73.2″ | 53.9″ | 109.1″ | 3,990 lb |
ROWS 1·SOURCE NHTSA vPIC / Transport Canada
645Ci on the used market
In 38 645Ci listings we have collected since June 2026, the 2004–2005 car is the most common: 38 of them (100%), at an average asking price of $7,215.
| Generation | Listings | Share | Average asking price | Average mileage |
|---|---|---|---|---|
| 2004–2005 | 38 | 100% | $7,215 | 109,053 mi |
ROWS 1·SOURCE ForCar, US used-car listings collected since June 2026
Will a 645Ci fit
| Space | Typical size | This car | Verdict |
|---|---|---|---|
| Single garage | 20 ft deep | 15.8 ft | Fits, with room to open the door |
| Street parking space | 18 ft | 15.8 ft | Fits comfortably |
| Standard parking bay width | 8.5 ft wide | 6.1 ft | Room to open doors both sides |
ROWS 3·SOURCE ForCar, computed from vehicle dimensions
Against cars of the same length
| Measure | This car | Typical of 1,047 cars within 10″ of its length | Difference |
|---|---|---|---|
| Width | 73.2″ | 73.2″ | same |
| Wheelbase | 109.1″ | 110.2″ | −1.1″ |
| Curb weight | 3,990 lb | 3,865 lb | +125 lb |
ROWS 3·SOURCE ForCar, computed across vehicles of similar length
645Ci against its rivals
Next to the Jaguar XK8, the 645Ci is the longest and the heaviest of the two.
| Model | Model year | Length | Width | Curb weight |
|---|---|---|---|---|
| BMW 645Ci (this car) | 2005 | 189.8″ | 73.2″ | 3,990 lb |
| Jaguar XK8 | 2006 | 187.4″ | 72″ | 3,876 lb |
ROWS 2·SOURCE NHTSA vPIC / Transport Canada; rivals: same EPA class and body, most searched
Upgrade to Pro
Specs vary by trim. Yours decodes from the VIN.
- Exact build, engine and factory options for one VIN
- The original window sticker as it left the factory
- What that specific configuration is worth today
- Decode a whole list of VINs at once
- No ads, on every page
- No ads, no tracking — and much more
Free plan available — no credit card needed
Everything on the BMW 645Ci
Frequently asked questions
Is the 2005 645Ci bigger than the 2004?
No. The 2005 and 2004 645Ci are the same size and weight.
Which is bigger, the 645Ci or the Jaguar XK8?
The 2006 Jaguar XK8 is 2.4″ shorter and 114 lb lighter than the 2005 645Ci.
Dimensions from NHTSA vPIC and Transport Canada vehicle records, manufacturer-declared for 2 645Ci model years, 2004 to 2005. Metric values converted to inches and pounds; generation boundaries are estimated from changes in size (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.
Found this useful?
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.