Riley 1½ Adelphi Sprite. (1936-38)

Whilst the Adelphi seems to have been officially offered with the Sprite engine, only one or two examples are recorded, and it seems unlikely that more than a handful were ever produced. Basic specification was identical to the standard Adelphi, but with the Sprite engine. It is entirely likely that whilst the car was advertised with the Sprite engine, they were only built to special order, thus extending the time it took for a customer to receive the model, and also preventing it from being test driven. As a result, dealers are unlikely to have pushed the model, and so sales remained, understandably, small.

Chassis Types: SS26A / 27A / 28A


4cyl ohv
RAC Rating 11.9hp
Bore 69 Stroke 100
Capacity 1496 cc
51bhp at 4800rpm
Carburation 2SU


Armstrong Siddeley Preselector 4-speed gearbox.
Top gear ratio 5.22:1
3rd G/r 7.39:1
2nd G/r 10.91:1
1st G/r 18.79:1
Reverse 23.91:1




Girling Mechanical rod with wedge operated shoes
13" drums


0-50mph 23.1secs
Max speed 78mph
Fuel Consumption 27mpg


Wheelbase 9'4.5" (aprx 2840mm)
Track 4'3" (aprx 1280mm)
Length 14'6.5" (aprx 4430mm)
Width 5'1.5" (aprx 1530mm)
Wheels Dunlop centre lock wire 3.0x18
Tyres 4.75x18
Fuel Tank 11.5 galls
Weight 25cwt


1936-7 £398; 1938 £423