| MODEL | ARIEL 3.5 HP 1915 |
| Year | 1915 |
| Engine Type | Single cylinder, four-stroke, sidevalve |
| Displacement / Capacity | 499 cc / 30.45 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3-speed |
| Clutch | — |
| Final Drive | Belt |
| CHASSIS SPECS | |
| Frame | Bicycle-type frame |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
By 1915 the 3.5 HP single is described as a sidevalve engine, still with belt drive and three speeds. It continued as a plain wartime-era roadster.
