BMW R 1250 R 2021 vs. BMW R 18 Classic 2023

Technical Specifications BMW R 1250 R 2021 compared to BMW R 18 Classic 2023

BMW R 1250 R 2021

BMW R 18 Classic 2023

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Differences

BMW R 1250 R 2021

BMW R 18 Classic 2023

Engine and Drive Train

Engine type	Engine type	Boxer	Engine type	Boxer
Bore	Bore	102.5 mm	Bore	107.1 mm
Stroke	Stroke	76 mm	Stroke	100 mm
Engine power	Engine power	136 HP	Engine power	91 HP
Rpm at Max. Power	Rpm at Max. Power	7,750 rpm	Rpm at Max. Power	4,750 rpm
Torque	Torque	143 Nm	Torque	158 Nm
Rpm at Torque	Rpm at Torque	6,250 rpm	Rpm at Torque	3,000 rpm
Compression Ratio	Compression Ratio	12.5	Compression Ratio	9.6
Fuel system	Fuel system	Injection	Fuel system	Injection
Throttle Bore	Throttle Bore	52 mm	Throttle Bore	48 mm
Starter	Starter	Electric	Starter	Electric
Clutch Type	Clutch Type	Antihopping	Clutch Type	Toughened, Dry
Transmission	Transmission	Prop shaft	Transmission	Prop shaft
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
Valves per cylinder	Valves per cylinder	4	Valves per cylinder	4
Valves	Valves	DOHC	Valves	OHV
Cooling	Cooling	liquid-air	Cooling	Oil-air
Displacement	Displacement	1,254 ccm	Displacement	1,802 ccm

Suspension Front

Front suspension	Front suspension	Upside-Down telescopic fork	Front suspension	Telescopic fork
Travel	Travel	140 mm	Travel	120 mm

Suspension Rear

Suspension	Suspension	Single swing arm	Suspension	Swing arm
Shock absorber	Shock absorber	Monoshock	Shock absorber	Monoshock
Travel	Travel	140 mm	Travel	90 mm
Material	Material	Aluminium	Material	Steel

Chassis

Frame	Frame	Steel	Frame	Steel
Frame type	Frame type	Load-bearing engine	Frame type	Double cradle
Rake	Rake	62.3 degree	Rake	57.3 degree
Trail	Trail	126.6 mm	Trail	150 mm

Brakes Front

Type	Type	Double disk	Type	Double disk
Diameter	Diameter	320 mm	Diameter	300 mm

Brakes Rear

Type	Type	Disc	Type	Disc
Diameter	Diameter	276 mm	Diameter	300 mm

Assistance Systems

Advanced Rider Assistance Systems	Advanced Rider Assistance Systems	ABS, Anti-slipping control, Riding modes, Ride by Wire	Advanced Rider Assistance Systems	ABS, Anti-slipping control, Riding modes, Combined Brake System, Ride by Wire

Dimensions and Weights

Front tyre width	Front tyre width	120 mm	Front tyre width	130 mm
Front tyre height	Front tyre height	70 %	Front tyre height	90 %
Front tyre diameter	Front tyre diameter	17 inch	Front tyre diameter	16 inch
Rear tyre width	Rear tyre width	180 mm	Rear tyre width	180 mm
Rear tyre height	Rear tyre height	55 %	Rear tyre height	65 %
Rear tyre diameter	Rear tyre diameter	17 inch	Rear tyre diameter	16 inch
Length	Length	2,165 mm	Length	2,440 mm
Width	Width	880 mm	Width	964 mm
Wheelbase	Wheelbase	1,515 mm	Wheelbase	1,731 mm
Seat Height	Seat Height	820 mm	Seat Height	710 mm
Kerb Weight (with ABS)	Kerb Weight (with ABS)	239 kg	Kerb Weight (with ABS)	365 kg
Fuel Tank Capacity	Fuel Tank Capacity	18 l	Fuel Tank Capacity	16 l
License compliancy	License compliancy	A	License compliancy	A