2018 BMW 640i xDrive Convertible

Compact Sedan Premium
BMW 640i xDrive Convertible 2018
22MPG Combined
1 Trim
← 2017 2018
Updated February 27, 2026

Get the full picture on the 2018 BMW 640i xDrive Convertible. As a Compact Sedan, it achieves 22 combined MPG and has not yet been rated by NHTSA. Below you’ll find detailed specs for every trim, plus recall information and competitor comparisons.

2018 BMW 640i xDrive Convertible Specifications

SpecValue
Combined MPG22 combined MPG
City MPG19
Highway MPG28
Body StyleCompact Sedan
Fuel TypePremium
DriveAWD
Available Trims1

Annual Fuel Cost

Based on EPA estimates, the 2018 BMW 640i xDrive Convertible costs approximately $2,650 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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