Harley-Davidson Fat Boy 117 2025 vs. BMW R 18 Roctane 2023

Technical Specifications Harley-Davidson Fat Boy 117 2025 compared to BMW R 18 Roctane 2023

Harley-Davidson Fat Boy 117 2025

BMW R 18 Roctane 2023

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Differences

Harley-Davidson Fat Boy 117 2025

BMW R 18 Roctane 2023

Engine and Drive Train

Engine type	Engine type	V	Engine type	Boxer
Bore	Bore	103.5 mm	Bore	107.1 mm
Stroke	Stroke	114.3 mm	Stroke	100 mm
Engine power	Engine power	104.5 HP	Engine power	91 HP
Rpm at Max. Power	Rpm at Max. Power	5,020 rpm	Rpm at Max. Power	4,750 rpm
Torque	Torque	168 Nm	Torque	158 Nm
Rpm at Torque	Rpm at Torque	3,000 rpm	Rpm at Torque	3,000 rpm
Compression Ratio	Compression Ratio	10.3	Compression Ratio	9.6
Fuel system	Fuel system	Injection	Fuel system	Injection
Starter	Starter	Electric	Starter	Electric
Transmission	Transmission	Belt	Transmission	Chain
Transmission Type	Transmission Type	Gearshift	Transmission Type	Gearshift
Number of gears	Number of gears	6	Number of gears	6
Cylinders	Cylinders	2	Cylinders	2
Strokes	Strokes	4-Stroke	Strokes	4-Stroke
Displacement	Displacement	1,923 ccm	Displacement	1,802 ccm

Suspension Front

Front suspension	Front suspension	Telescopic fork	Front suspension	Telescopic fork
Diameter	Diameter	49 mm	Diameter	49 mm

Suspension Rear

Suspension	Suspension	Swing arm	Suspension	Swing arm
Shock absorber	Shock absorber	Monoshock	Shock absorber	Monoshock
Travel	Travel	43 mm	Travel	90 mm
Material	Material	Aluminium	Material	Steel

Chassis

Rake	Rake	30 degree	Rake	55.3 degree
Trail	Trail	104 mm	Trail	185 mm

Brakes Front

Type	Type	Single disk	Type	Double disk
Piston	Piston	Four pistons	Piston	Four pistons
Shock mount	Shock mount	Fixed caliper	Shock mount	Fixed caliper

Brakes Rear

Type	Type	Disc	Type	Disc
Piston	Piston	Double piston	Piston	Four pistons
Shock mount	Shock mount	Floating caliper	Shock mount	Fixed caliper

Assistance Systems

Advanced Rider Assistance Systems	Advanced Rider Assistance Systems	ABS, Riding modes, Cornering ABS, Engine drag torque control, Tire pressure monitoring system, Cruise control, Traction control	Advanced Rider Assistance Systems	ABS

Dimensions and Weights

Front tyre width	Front tyre width	160 mm	Front tyre width	120 mm
Front tyre height	Front tyre height	60 %	Front tyre height	70 %
Front tyre diameter	Front tyre diameter	18 inch	Front tyre diameter	21 inch
Rear tyre width	Rear tyre width	240 mm	Rear tyre width	180 mm
Rear tyre height	Rear tyre height	40 %	Rear tyre height	55 %
Rear tyre diameter	Rear tyre diameter	18 inch	Rear tyre diameter	16 inch
Length	Length	2,365 mm	Length	2,615 mm
Width	Width	965 mm	Width	982 mm
Wheelbase	Wheelbase	1,650 mm	Wheelbase	1,720 mm
Seat Height	Seat Height	675 mm	Seat Height	720 mm
Fuel Tank Capacity	Fuel Tank Capacity	18.9 l	Fuel Tank Capacity	16 l
Range	Range	343 km	Range	285 km
Combined CO2 emissions	Combined CO2 emissions	128 g/km	Combined CO2 emissions	129 g/km
Combined fuel consumption	Combined fuel consumption	5.5 l/100km	Combined fuel consumption	5.6 l/100km