The 2018 BMW 4 Series Convertible gets a 2-liter I4 under the hood that makes 248 hp @ 5200 rpm horsepower and 258 lb.-ft. @ 1450 rpm of torque. This engine is quite fuel-efficient and helps the car deliver a mileage of 24 mpg in the city and 34 mpg on the highway. The combined efficiency of the engine comes out to be 27 mpg as rated by the EPA.

For the performance-oriented buyers, BMW provides an option to choose another engine. It's a 3-liter I6 motor that churns out 320 hp @ 5500 rpm horsepower and 330 lb.-ft. @ 1380 rpm of torque. The engine is a gas guzzler and provides an efficiency of 21 mpg in the city, 29 mpg on the highway and combined mileage of 24 mpg. The total fuel-tank capacity of the car is 15.8 gallons and you can travel up to 331.8/458.2 miles once it's full.

2018 BMW 4 Series Convertible MPG and Range

Trim NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
430i 2dr Convertible (2.0L 4cyl Turbo 8A)24 mpg34 mpg27 mpg15.8 gal.379.2/537.2 mi.
430i xDrive 2dr Convertible AWD (2.0L 4cyl Turbo 8A)22 mpg32 mpg26 mpg15.8 gal.347.6/505.6 mi.
440i 2dr Convertible (3.0L 6cyl Turbo 8A)21 mpg29 mpg24 mpg15.8 gal.331.8/458.2 mi.
440i xDrive 2dr Convertible AWD (3.0L 6cyl Turbo 8A)20 mpg29 mpg23 mpg15.8 gal.316.0/458.2 mi.

Used 2018 BMW 4 Series Convertible For Sale

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2018 BMW 4 Series
4

2018 BMW 4 Series 430i Gran Coupe

430i xDrive 4dr Sedan AWD (2.0L 4cyl Turbo 8A)

$19,699
Est. $267/mo
Excellent Deal
$6,861 Below market
RMV: $26,560
Jersey City, NJ
2018 BMW 4 SeriesHome Delivery
17
Price Drop, $200
Previous Price: $2099517 Aug 2022

2018 BMW 4 Series 430i Gran Coupe

430i xDrive 4dr Sedan AWD (2.0L 4cyl Turbo 8A)

$20,795
Est. $282/mo
Excellent Deal
$7,069 Below market
RMV: $27,864
Hempstead, NY
2018 BMW 4 Series
24
Price Drop, $6000
Previous Price: $2895003 Aug 2022

2018 BMW 4 Series 430i Gran Coupe

430i xDrive 4dr Sedan AWD (2.0L 4cyl Turbo 8A)

$22,950
Est. $311/mo
Excellent Deal
$6,919 Below market
RMV: $29,869
Hollis, NY
2018 BMW 4 SeriesHome Delivery
5

2018 BMW 4 Series 430i Gran Coupe

430i xDrive 4dr Sedan AWD (2.0L 4cyl Turbo 8A)

$21,900
Est. $297/mo
Excellent Deal
$5,954 Below market
RMV: $27,854
Elizabeth, NJ
2019 BMW 4 SeriesHome Delivery
3
Price Drop, $1000
Previous Price: $3100019 Jul 2022

2019 BMW 4 Series 430i Coupe

440i Coupe RWD

$30,000
Est. $407/mo
Excellent Deal
$7,796 Below market
RMV: $37,796
Jacksonville, FL
2018 BMW 4 Series
17

2018 BMW 4 Series 430i

430i 2dr Coupe (2.0L 4cyl Turbo 8A)

$29,998
Est. $407/mo
Excellent Deal
$7,261 Below market
RMV: $37,259
Wichita, KS
2019 BMW 4 Series
6
Price Drop, $2225
Previous Price: $3517503 Aug 2022

2019 BMW 4 Series 430i Convertible

430i xDrive 2dr Convertible AWD (2.0L 4cyl Turbo 8A)

$32,950
Est. $447/mo
Excellent Deal
$7,874 Below market
RMV: $40,824
Hollis, NY
2019 BMW 4 Series
17
Price Drop, $2000
Previous Price: $2799504 Aug 2022

2019 BMW 4 Series 430i Gran Coupe

430i xDrive 4dr Sedan AWD (2.0L 4cyl Turbo 8A)

$25,995
Est. $352/mo
Excellent Deal
$6,175 Below market
RMV: $32,170
West Hempstead, NY
2018 BMW 4 SeriesHome Delivery
4

2018 BMW 4 Series 430i Gran Coupe

430i 4dr Sedan (2.0L 4cyl Turbo 8A)

$17,900
Est. $243/mo
Excellent Deal
$4,213 Below market
RMV: $22,113
Elizabeth, NJ
The 2018 BMW 4 Series Convertible provides the fuel efficiency figures of 22 mpg in the city, 31.5 mpg on the highway and 25 mpg combined. Though these numbers are respectable, the 2018 BMW 4 Series Convertible still falls a little behind 2018 BMW 2 Series Convertible as the latter possess better mileage figures.

The total fuel tank capacity of the car is 15.8 gallons which provides a total travel range of 316.0/458.2 - 379.2/537.2 miles. The overall range of the 2018 BMW 4 Series Convertible is also less in comparison to some of its rivals due to lower efficiency but you won't have to visit the filling stations every now and then.

2018 BMW 4 Series Convertible vs. Competitor's MPG and Range

Car NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
2018 BMW 4 Series Convertible20 - 24 mpg29 - 34 mpg23 - 27 mpg15.8 gal.316.0/458.2 - 379.2/537.2 mi.
2018 BMW M240i Convertible21 mpg30 mpg24 mpg13.7 gal.287.70 / 411.00 mi.
2018 Mercedes-Benz SLC-Class20 - 25 mpg29 - 32 mpg23 - 27 mpg15.9 gal.370.0/536.5 - 397.50 / 508.80 mi.
2018 Audi A5 Cabriolet20 - 24 mpg29 - 34 mpg23 - 27 mpg15.3 gal.367.20 / 520.20 - 371.8/540.8 mi.
2018 Mercedes-Benz C-Class Convertible22 mpg29 mpg25 mpg17.4 gal.382.80 / 504.60 mi.
2018 Porsche 718 Boxster20 - 21 mpg26 - 28 mpg22 - 24 mpg14.3 - 16.9 gal.300.30 / 400.40 - 338.00 / 439.40 mi.
2018 BMW 2 Series Convertible23 - 24 mpg33 - 34 mpg27 mpg13.7 gal.270.0/427.5 - 315.1/452.1 mi.

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2017 BMW 4 Series Convertible MPG and Range

Trim NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
430i 2dr Convertible SULEV (2.0L 4cyl Turbo 8A)23 mpg34 mpg27 mpg15.8 gal.-
430i xDrive 2dr Convertible AWD SULEV (2.0L 4cyl Turbo 8A)22 mpg32 mpg26 mpg15.8 gal.-
440i 2dr Convertible (3.0L 6cyl Turbo 8A)21 mpg29 mpg24 mpg15.8 gal.331.80 / 458.20 mi.
440i xDrive 2dr Convertible AWD (3.0L 6cyl Turbo 8A)20 mpg30 mpg24 mpg15.8 gal.316.00 / 474.00 mi.

2017 BMW 4 Series Convertible vs. Competitor's MPG and Range

Car NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
2017 BMW 2 Series Convertible23 mpg33 - 34 mpg26 - 27 mpg13.7 gal.315.10 / 452.10 mi.
2017 BMW M240i Convertible21 mpg31 - 32 mpg25 mpg13.7 gal.287.70 / 424.70 mi.
2017 BMW 4 Series Convertible20 - 23 mpg29 - 34 mpg24 - 27 mpg15.8 gal.316.00 / 474.00 - 331.80 / 458.20 mi.
2017 Mercedes-Benz C-Class Convertible22 - 23 mpg29 - 31 mpg25 - 26 mpg17.4 gal.382.80 / 504.60 - 400.20 / 539.40 mi.
2017 Porsche 718 Boxster20 - 21 mpg26 - 28 mpg22 - 24 mpg14.3 - 16.9 gal.300.30 / 400.40 - 338.00 / 439.40 mi.

2016 BMW 4 Series Convertible MPG and Range

Trim NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
435i xDrive 2dr Convertible AWD (3.0L 6cyl Turbo 8A)20 mpg29 mpg23 mpg15.8 gal.316.00 / 458.20 mi.
435i 2dr Convertible (3.0L 6cyl Turbo 8A)20 mpg31 mpg24 mpg15.8 gal.316.00 / 489.80 mi.
428i xDrive 2dr Convertible AWD SULEV (2.0L 4cyl Turbo 8A)23 mpg33 mpg25 mpg15.8 gal.-
428i 2dr Convertible SULEV (2.0L 4cyl Turbo 8A)23 mpg34 mpg27 mpg15.8 gal.-

2016 BMW 4 Series Convertible vs. Competitor's MPG and Range

Car NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
2016 BMW 4 Series Convertible20 - 23 mpg29 - 34 mpg23 - 27 mpg15.8 gal.316.00 / 458.20 mi.
2016 Ford Mustang Convertible17 - 22 mpg28 - 29 mpg21 - 24 mpg15.5 - 16 gal.272.00 / 448.00 - 341.00 / 480.50 mi.
2016 Jaguar F-TYPE Convertible15 - 19 mpg23 - 28 mpg18 - 22 mpg15.8 - 18.5 gal.277.50 / 444.00 - 351.50 / 518.00 mi.
2016 Chevrolet Camaro Convertible21 mpg30 mpg24 mpg19 gal.-

2015 BMW 4 Series Convertible MPG and Range

Trim NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
435i xDrive 2dr Convertible AWD (3.0L 6cyl Turbo 8A)20 mpg29 mpg24 mpg15.8 gal.316.00 / 458.20 mi.
435i 2dr Convertible (3.0L 6cyl Turbo 8A)20 mpg31 mpg25 mpg15.8 gal.316.00 / 489.80 mi.
428i xDrive 2dr Convertible AWD SULEV (2.0L 4cyl Turbo 8A)23 mpg33 mpg25 mpg15.8 gal.-
428i xDrive 2dr Convertible AWD (2.0L 4cyl Turbo 8A)21 mpg33 mpg26 mpg15.8 gal.331.80 / 521.40 mi.
428i 2dr Convertible SULEV (2.0L 4cyl Turbo 8A)23 mpg34 mpg27 mpg15.8 gal.-
428i 2dr Convertible (2.0L 4cyl Turbo 8A)23 mpg34 mpg28 mpg15.8 gal.363.40 / 537.20 mi.

2015 BMW 4 Series Convertible vs. Competitor's MPG and Range

Car NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
2015 BMW 4 Series Convertible20 - 23 mpg29 - 34 mpg24 - 28 mpg15.8 gal.316.00 / 458.20 - 363.40 / 537.20 mi.
2015 Ford Mustang Convertible17 - 22 mpg28 - 31 mpg22 - 26 mpg15.5 - 16 gal.272.00 / 448.00 - 341.00 / 480.50 mi.
2015 Jaguar F-TYPE Convertible16 - 20 mpg23 - 28 mpg19 - 24 mpg18.5 gal.351.50 / 499.50 mi.
2015 Chevrolet Camaro Convertible17 mpg28 mpg22 mpg19 gal.323.0/532.0 mi.

2014 BMW 4 Series Convertible MPG and Range

Trim NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
435i 2dr Convertible (3.0L 6cyl Turbo 8A)20 mpg30 mpg25 mpg15.8 gal.316.00 / 474.00 mi.
428i xDrive 2dr Convertible AWD SULEV (2.0L 4cyl Turbo 8A)21 mpg33 mpg25 mpg15.8 gal.331.80 / 521.40 mi.
428i xDrive 2dr Convertible AWD (2.0L 4cyl Turbo 8A)21 mpg33 mpg26 mpg15.8 gal.-
428i 2dr Convertible SULEV (2.0L 4cyl Turbo 8A)23 mpg34 mpg27 mpg15.8 gal.363.40 / 537.20 mi.
428i 2dr Convertible (2.0L 4cyl Turbo 8A)23 mpg34 mpg28 mpg15.8 gal.320.00 / 480.00 - 360.0/520.0 mi.

2014 BMW 4 Series Convertible vs. Competitor's MPG and Range

Car NameMPG CityMPG HighwayMPG CombinedFuel Tank CapacityRange in Miles
2014 Lexus IS 250 C21 mpg30 mpg25 mpg17.2 gal.361.20 / 516.00 mi.
2014 Mercedes-Benz SLK-Class21 - 22 mpg29 - 32 mpg25 - 27 mpg18.5 gal.388.50 / 536.50 - 407.00 / 592.00 mi.
2014 Audi TTS Convertible22 mpg31 mpg26 mpg15.9 gal.349.80 / 492.90 mi.
2014 BMW 4 Series Convertible20 - 23 mpg30 - 34 mpg25 - 28 mpg15.8 gal.316.00 / 474.00 - 363.40 / 537.20 mi.
2014 Infiniti Q60 Convertible16 - 18 mpg24 - 26 mpg20 - 22 mpg20 gal.320.00 / 480.00 - 360.0/520.0 mi.

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