What Changed

The 4-series receives a revised suspension, LED headlamps, LED tail lamps, and subtle styling updates for the 2018 model year.

Comparison to Prior Model

2018 BMW 4-Series convertible 2017 BMW 4-Series convertible
2018 BMW 4-Series convertible 2017 BMW 4-Series convertible
Price Range ($) $50,550 - $77,800 $50,300 - $77,600
Length (in) 182.6 182.6
Wheelbase (in) 110.6 110.6
Width (in) 71.9 71.9
Height (in) 54.5 54.5
Track (in) 61.0 61.0
Exterior Volume (cu. ft.) 351.9 351.9
Curb Weight (lbs.) 4050-4330 4050-4330
Legroom Total (in.) 75.3 75.3
Passenger Volume (cu. ft.) 90.0 90.0
Cargo Volume (cu. ft.) 13 13
Driven Wheels
  • RWD
  • AWD
  • RWD
  • AWD
Engines
  • 2.0l I4 T (248-bhp)
  • 3.0l I6 T (320-bhp)
  • 3.0l I6 T (425-bhp)
  • 2.0l I4 T (248-bhp)
  • 3.0l I6 T (320-bhp)
  • 3.0l I6 T (425-bhp)
Transmissions A8, M6, SM7 A8, M6, SM7
City MPG 16-24 17-23
Highway MPG 22-34 24-34
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