The owner of one of these Twenty Fives has single pedal control form normal driving. He can make a perfect change silently, surely, at any speed, without touching the clutch. The combination of free wheel and synchromesh provide that. Automatically the car coasts down gradients (with an appreciable saving in petrol consumption over a season's running) and thanks to Bendix Automatic Clutch control - the clutch need never be touched even for stopping and starting. More over, convential - as for instance clutch on an unknown descent. The free wheel and/ or Bendix automatic clutch can be put out of action by a simple dash control. The drive then reverts immediately to normal.

Low built with added safety and even more pleasent appearance, finer radiators and frontal appearance, still more considerate comfort, fine flowing coachword design, these and an amazing acceleration are all notable features of the 1935 Morris Twenty Five.

General
The design consists of a six cylinder water cooled engine built in unit construction with a totally enclosed single plate clutch with cork inserts and a synchromesh four speed gearbox with free wheel.

The power unit is mounted in a frame of deep section with a generous stiffening member of the "X" formation. Long semi elliptic springs, efficiently controlled by double acting hydraulic shock absorbers, carrying front and rear axels, which posscess a track of 4 ft 8 in (1.422m) and a wheelbase of 10 ft 0 in (3.048m).

Engine
The six cylinder engine has bore of 82 mm (3.28in) a stroke of 110 mm (4.3in) and a cubic capacity of 3486 cc (212.7in) with a treasury rating of 25 hp. Tax of £25.

The cylinders are cast in one with the skirt of the crankcase which is extended well below the crankshaft center and liberally reinforced with internal webs, producing a deep girder structure of tremendous strength. The crankshaft is of the four bearing type, with bearings of the largest possible dimensions. The crankshaft is balanced both statically and dynamically to very fine limits and is fitted with a torson vibration damper. The main and big end bearings are of the full ring shim less type. The steel connecting and the complete assemblies of rods and pistons are individually balanced, weight to within .02 oz (best aero engine practice).

Side by side valves are fitted and operated in conjunction with a detachable head of advance design. The valves are operated by a camshaft of large diameter, driven by a duplex roller chain from the crankshaft, which also serves to drive the dynamo.

The tappet guides are mounted in three units which can be completely removed. The induction pipe and exhaust manifold are cast integral and provide with adequate hot spots. An important feature of the induction system is the combind air cleaner and preheating cover, which also collects and comsumes all fumes discharged from the crankcase breather.

The Synchromesh Gearbox and Free Wheel
The easy change four speed gearbox is provided with synchromesh mechanism with interceptor for the engagement of top and third gears, which are of the constant mesh silent type. Gear selection is by centrally disposed lever. Gear changing is rendered a completely simple operation by the addition of a free wheel device which can be locked when desire.

The Automatic Clutch Control
Bendix automatic clutch control is provided. The car can therefore be driven entirely by simple actuation of the accelerator pedal and gear lever without manual clutch operation. The automatic clutch control is brought into operation by a conveniently placed control.

Lubrication
A spur gear pump mounted on the side of the crankcase and driven from the cranksaft by a diagonal shaft supplies oil for a full force feed oiling circuit. The oil passes through a large and efficient filter covering the greater part of the sump before entering into circulation. Chassis lubrication is by Enots high pressure oil gun and accessible nipples.

Cooling System
A centrifugal pump driven from the rear of the fan spindle circulates the cooling water. it is passed from the cylinder head through three carefully positioned ports which ensure even temperature distribution. The water is maintained at the most efficient temperature by automatically operated radiator shutters and the radiator is fan assistant.

Electrical Equipment
Ignition is by battery and coil with the automatically controlled distributor mounted vertically at cylinder head level. The dynamo is carried well up on the side of the engine, where it is readily accessible. The starter motor is of the sliding pinion type and provided with Startix automatic switch. Lucas Biflex headlamps with dipping reflectors, sidefamps, and stop and reverse lamp are standard equipment, while all lighting and dynamo switches, together with the ignition, slow running adjustment for the throttle, and dipping headiarnp mechanism, are mounted in the centre of the steering wheel. Included is an electric windscreen wiper with twin blades, concealed traffic indicators with automatic release switch, and master battery switch.

Carburation
The working mixture is supplied by an S.U. carburetter feeding into an induction pipe cast integral with the cylinder head. The carburetter is fitted with adequate control over the mixture strength. An air-preheating and cleaning cover is fitted to the head, which consumes all crankcase fumes and prevents them from entering the body of the car.

Petrol Tank
A petrol tank of 17 gallons (77 litres) capacity is carried at the rear, and is provided with an efficient pebble guard. Indication of its contents is given by an electric gauge with instru- ment panel dial. Petrol is fed to the carburetter by an S.U. auto- matic electric petrol pump.

Transmission
The clutch is of the single plate type with cork inserts running in oil. Its action is light, smooth and certain under all conditions, and its lubrication is automatic. A Spicer balanced tubular propeller shaft, with Spicer universal joints at either end, transmits the drive to the spiral bevel final drive gears, which are differential equipped. The axles are of the three-quarter floating type.

Four wheel Brakes
Fully compensated four-wheel brakes of the lockbeed hydraulic pattern are fitted. Maximum braking efficiency is maintained at all times, there being no lost motion or loss of leverage. A powerful hand brake operating on the rear wheels is also fitted.

Steering
The steering gear is of the Bishop cam type, extremely light and certain in operation.

Suspension
The long semi elliptic springs front and rear are effectively controlled by hydraulic shock absorbers by the double acting hydraulic type.

Tool Kit
A kit of tools is provided with every car, housed in an accessible toolbox.