
Stay up to date by tracking the KBB.com Fair Purchase Price.

Fair Purchase Price is determined by collecting thousands of actual consumer vehicle purchase prices, plus data from national vehicle registration databases and several other reliable third-party sources.
Condition | Trade-In Value | Private Party Value | ||
|---|---|---|---|---|
Excellent | $14,020 | $16,760 | ||
Very Good | $13,420 | $16,110 | ||
Good | $12,820 | $15,410 | ||
Fair | $11,220 | $13,560 |
Estimated Trade-In Values for the 2015 BMW 6 Series 640i xDrive Convertible 2D range from about $11,220 to $14,020 depending on vehicle condition. Estimated Private Party Values range from about $13,560 to $16,760 depending on vehicle condition. Valid for ZIP Code 55415 through 7/3/2026.
Curb Weight | 4455 lbs. | ||
|---|---|---|---|
Fuel Capacity | 18.5 gallons | ||
Max Seating Capacity | 4 | ||
Overall Length | 192.8 inches | ||
Wheel Base | 112.4 inches | ||
Width with mirrors | 81.9 inches |
Adaptive Headlights | Available | ||
|---|---|---|---|
Alloy Wheels | Available | ||
Fog Lights | Available | ||
HID Headlights | Available | ||
Number of Doors | 2 doors | ||
Power Folding Exterior Mirrors | Available | ||
Power Retractable Top | Available | ||
LED Headlights | Available |
City | 20 mpg | ||
|---|---|---|---|
Highway | 29 mpg | ||
Combined | 23 mpg |
Drivetrain | AWD | ||
|---|---|---|---|
Transmission Type | Automatic | ||
8 speed | Available | ||
Recommended Fuel | Premium | ||
Hill Descent Control | Available |
Horsepower | 315 @ 5800 RPM | ||
|---|---|---|---|
Torque | 330 @ 1400 rpm | ||
Engine | 6-Cyl, Turbo, 3.0 Liter | ||
Top Speed | 130 mph |
Basic | 4 years / 50000 miles | ||
|---|---|---|---|
Powertrain | 4 years / 50000 miles | ||
Corrosion | 12 years / Unlimited miles |
With prodigious power, advanced technology, and luxurious surroundings, the 2015 BMW 6 Series offers a surprising value compared to competition like the Jaguar XK and Mercedes-Benz E-Class Coupe.
Of course, "value" is relative, as the base price of a BMW 6 Series is more than $75,000. If that’s too dear for you, the Audi S5 offers a quick package at a considerably lower price. BMW’s own 4 Series coupe does the same, and keeps that coveted badge.
![]() Used 2015 BMW 6 Series 640i xDrive Convertible 2D | ![]() Used 2018 MINI Convertible | ![]() Used 2015 Lexus IS | ![]() Used 2017 Ford Mustang | ||
|---|---|---|---|---|---|
| Price | $17,500 | $14,950 | $16,050 | $16,750 | |
| KBB.com Rating | 3.9 | 3.8 | N/A | 4.7 | |
| Consumer Rating | 4.8 | 4.6 | 4.4 | 4.6 | |
| Fuel Economy | City 20/Hwy 29/Comb 23 MPG | City 23/Hwy 32/Comb 26 MPG | City 21/Hwy 30/Comb 24 MPG | City 18/Hwy 27/Comb 21 MPG | |
| Fuel Type | Gas | Gas | Gas | Gas | |
| Seating Capacity | 4 | 4 | 4 | 4 | |
| Basic Warranty | 4 years or 50000 miles | 4 years or 50000 miles | 4 years or 50000 miles | 3 years or 36000 miles | |
| Horsepower | 315 @ 5800 RPM | 189 @ 4700 RPM | 204 @ 6400 RPM | 300 @ 6500 RPM | |
| Engine | 6-Cyl, Turbo, 3.0 Liter | 4-Cyl, Turbo, 2.0 Liter | V6, 2.5 Liter | V6, 3.7 Liter | |
| Drivetrain | AWD | FWD | RWD | RWD |