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Mercedes-Benz 420 SL

(1985 model)

Brief specs of 1985 Mercedes-Benz 420 SL

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 8-cylinder 16-valve V engine, SOHC (single overhead camshaft), 4196 cm3 / 256.1 cu in / 256.1 cu in, 162.6 kW / 218.1 hp / 218.1 hp @ 5200 rpm / 5200 rpm / 5200 rpm, 329.0 N·m / 242.7 lb·ft / 242.7 lb·ft @ 3750 rpm / 3750 rpm / 3750 rpm, rear wheel drive, 214 km/h / 133 mph / 133 mph top speed

units: metric UK US

Basic (general) data

Marque (make)Mercedes-BenzIssued from1985
Model420 SLIssued until
Serie420Number made
Model familyBody construction
Model codeBody designation
ManufacturerMercedes-BenzCountryDE

Bodywork

Base platformNumber of doors2
Bodywork typedrophead coupé (convertible coupé)Number of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)4220 l / 149.03 cu ft / 149.03 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4389 mm / 172.8 in / 172.8 inTotal (curb) weight1600 kg / 3527 lb / 3527 lb
Width1791 mm / 70.5 in / 70.5 inDry weight
Height1295 mm / 51.0 in / 51.0 inLoad capacity
Wheelbase2454 mm / 96.6 in / 96.6 inGross (max.) weight
Track frontTowing weight
Track rearWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio1.79  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.97 m2 / 21.2 sq ft / 21.2 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders8
Engine TypeV engine (V8)Total number of valves16
Engine ManufacturerMercedes-BenzValves per cylinder2
Engine constructionBore92.0 mm / 3.62 in / 3.62 in
Fuelpetrol (gasoline)Stroke78.9 mm / 3.11 in / 3.11 in
Fuel detailsBore/Stroke ratio1.17
Fuel supplyBo KE-Jet fuel inj.Engine displacement4196 cm3 / 256.1 cu in / 256.1 cu in
Engine Main bearings5Unitary capacity524.50 cm3/cylinder / 32.007 cu in/cylinder / 32.007 cu in/cylinder
Cam DesignSOHC (single overhead camshaft)Compression ratio9.0 : 1
SumpMax. output power162.6 kW / 218.1 hp / 218.1 hp at 5200 rpm / 5200 rpm / 5200 rpm
AspirationnaturalMax. torque329.0 N·m / 242.7 lb·ft / 242.7 lb·ft at 3750 rpm / 3750 rpm / 3750 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)67.4 kW / 90.4 hp / 90.4 hp (est.)
CoolantwaterSpecific output38.8 kW/l / 0.852 bhp/cu in / 0.852 bhp/cu in
Catalytic converterSpecific torque78.4 N·m/l / 0.69 lb·ft/cu in / 0.69 lb·ft/cu in

Transmission

Transmission typeNumber of gears
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed214 km/h / 133 mph / 133 mph
Acceleration 0-60 mph (97 km/h)8.30 s / 8.30 s / 8.30 sPower-to-weight ratio136.2 kW/ton / 103.2 bhp/ton / 103.2 bhp/ton
Acceleration 0-100 km/h9.00 s / 9.00 s / 9.00 sFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
SteeringSteering details
Turns lock-to-lockTurning circle
Suspension frontSuspension rear
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Mercedes-Benz 420 SL

Infobox

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