| MODEL | ARIEL LF 1929 |
| Year | 1929 |
| Engine Type | Single cylinder, four-stroke, OHV |
| Displacement / Capacity | 249 cc / 15.19 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | Carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Expanding (drum) brake |
| Rear Brakes | Expanding (drum) brake |
| 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 | — |
The overhead-valve counterpart to the LB in Ariel's 250 cc class, with twin exhaust pipes, black finish and drum brakes front and rear. It offered a sportier valve layout than the sidevalve model.
