(1903 model)
6-cylinder 12-valve straight (inline) engine, side valves (flathead, L-block, L-head), 4855 cm3 / 296.3 cu in / 296.3 cu in, rear wheel drive
| Marque (make) | Napier | Issued from | 1903 |
|---|---|---|---|
| Model | 18 L49 | Issued until | |
| Serie | 18 | Number made | |
| Model family | Body construction | ||
| Model code | Body designation | ||
| Manufacturer | Napier | Country | UK |
| Base platform | Number of doors | ||
|---|---|---|---|
| Bodywork type | Number of seats | ||
| Bodywork designer | Cargo capacity (volume) | ||
| Passenger space (volume) | Max. cargo capacity (volume) |
| Length | Total (curb) weight | ||
|---|---|---|---|
| Width | Dry weight | ||
| Height | Load capacity | ||
| Wheelbase | 2629 mm / 103.5 in / 103.5 in | Gross (max.) weight | |
| Track front | 1270 mm / 50.0 in / 50.0 in | Towing weight | |
| Track rear | 1270 mm / 50.0 in / 50.0 in | Weight distribution (front) | |
| Ground clearance | Fuel capacity | ||
| Length/wheelbase ratio |
| Drag coefficient (Cd, Cx, Cw) | Frontal area (A) | ||
|---|---|---|---|
| Aerodynamic coefficient (Cd×A) | Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph) |
| Engine Code | Total number of cylinders | 6 | |
|---|---|---|---|
| Engine Type | straight (inline) | Total number of valves | 12 |
| Engine Manufacturer | Napier | Valves per cylinder | 2 |
| Engine construction | Bore | 101.6 mm / 4.00 in / 4.00 in | |
| Fuel | Stroke | 101.6 mm / 4.00 in / 4.00 in | |
| Fuel details | Bore/Stroke ratio | 1 | |
| Fuel supply | 1 Napier carb | Engine displacement | 4855 cm3 / 296.3 cu in / 296.3 cu in |
| Engine Main bearings | Unitary capacity | 809.17 cm3/cylinder / 49.379 cu in/cylinder / 49.379 cu in/cylinder | |
| Cam Design | side valves (flathead, L-block, L-head) | Compression ratio | |
| Sump | Max. output power | at | |
| Aspiration | Max. torque | at | |
| Compressor type | Maximum rpm | ||
| Intercooler | Max. net output (power at the wheels) | ||
| Coolant | water | Specific output | |
| Catalytic converter | Specific torque |
| Transmission type | Number of gears | ||
|---|---|---|---|
| Wheel drive | rear wheel drive | Top gear (drive) ratio | |
| Final gear (drive) ratio |
| Acceleration 0-50 mph (80 km/h) | Top (maximal) speed | ||
|---|---|---|---|
| Acceleration 0-60 mph (97 km/h) | Power-to-weight ratio | ||
| Acceleration 0-100 km/h | Fuel consumption, City (urban) | ||
| Acceleration 0-100 mph (160 km/h) | Fuel consumption, Road (extra-urban) | ||
| Acceleration 80-120 km/h (50-70 mph) in top | Fuel consumption, Mixed (combined) | ||
| Standing ¼mile time | Fuel consumption, Euro | ||
| Standing kilometer time | CO2 emissions | ||
| Range |
| Engine location | front | Engine alignment | longitudinal |
|---|---|---|---|
| Steering | Steering details | ||
| Turns lock-to-lock | Turning circle | ||
| Suspension front | Suspension rear | Live axle, Semi-elliptic leaf springs | |
| Wheels front | Wheels rear | ||
| Tyres front | Tyres rear | ||
| Brakes front | Brakes rear | ||
| Brake diameter front | Brake diameter rear | ||
| Brakes details | Braked area |
Technical specifications and performance data of Napier 18 L49
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