BMW 645ci MPG by year — every rating on record
The BMW 645ci has a combined EPA fuel economy rating for 2 model years, from 2004 to 2005. Across those years its best rated version returned 19 mpg (2004) and its thirstiest returned 17 mpg (2004). The EPA record holds 6 configurations for this nameplate, most recently a Midsize Cars.
In the EPA record this nameplate also appears as 645ci and 545i. The figures below cover every one of them.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2004 | 3 | 19 mpg | 17 mpg | #38 of 55 (31th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2005 | 3 | 19 mpg | 17 mpg | #38 of 56 (33th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The BMW 645ci placed highest in 2004 at #38 of 55, and lowest in 2004 at #38 of 55. It spent 0 of its 2 ranked years in the top half of its class.
Every configuration on record
All 6 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2005 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl | 15 | 22 | 17 | 676.5 | 17.5 | $4,550 | 522.7647058823529 | n/a |
| 2005 | 4.4L 8-cyl Rear-Wheel Drive Manual 6-spd Premium | 4.4L 8-cyl | 15 | 23 | 18 | 638.9 | 16.5 | $4,300 | 493.72222222222223 | n/a |
| 2005 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl | 16 | 24 | 19 | 605.3 | 15.7 | $4,100 | 467.7368421052632 | n/a |
| 2004 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl | 15 | 22 | 17 | 676.5 | 17.5 | $4,550 | 522.7647058823529 | n/a |
| 2004 | 4.4L 8-cyl Rear-Wheel Drive Manual 6-spd Premium | 4.4L 8-cyl | 15 | 23 | 18 | 638.9 | 16.5 | $4,300 | 493.72222222222223 | n/a |
| 2004 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl | 16 | 24 | 19 | 605.3 | 15.7 | $4,100 | 467.7368421052632 | n/a |
What 645ci fuel costs over a year
At the EPA's 11,500 miles a year, the 2005 BMW 645ci burns 605 to 676 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $1,816 | $2,029 | $214 |
| $3.50/gal | $2,118 | $2,368 | $249 |
| $4.00/gal | $2,421 | $2,706 | $285 |
EPA’s own estimate for the 2005 model year is $4,100 to $4,550 a year in fuel, or $10,250 more than the average new vehicle over five years.
How it compares with other Midsize Cars
Across the 483 nameplates EPA classifies as Midsize Cars, the median best combined rating is 25 mpg. At 19 mpg the BMW 645ci is 6 mpg below the median, which is worth about $508 a year at $3.50 a gallon.
- All Midsize Cars rankings — every nameplate in the class, best to worst.
Other BMW nameplates
Every BMW model compared → — all nameplates ranked by best combined rating, with what each one costs a year.