Austin Seven buyer's guide

All Sevens are much the same car.

A 1923 Chummy and a 1938 Ruby differ in wheelbase, brakes, gearbox, crank, body construction and driving feel. Decide which era suits you before viewing.

The three-bearing crank is always the better engine.

The 1936 three-bearing crank is smoother, but club and magazine guides note that worn later engines often rumble, and some owners rate the earlier two-bearing type as more robust. Condition and history matter more than type.

Coupled brakes make a Seven stop like a modern car.

Coupling lets the pedal work all four drums, but the drums are small and cable-operated. Stopping still takes firm pressure and distance, even on well set up cars.

Any Seven over 40 years old is automatically MOT exempt.

Exemption depends on the car not having been substantially changed in the last 30 years. Many specials and Q-plated cars fall outside it, and owners must keep any car roadworthy.

Chassis and structure

The Seven uses a simple A-shaped steel chassis with the front axle on a transverse leaf spring and quarter-elliptic springs at the rear. It is easy to inspect, so there is no excuse not to look closely.

• With a torch, follow both side rails from the front crossmember to the rear spring mountings, looking for heavy rust, cracks and old weld repairs.
• Look at the rear spring mountings at the back of the frame where the quarter-elliptic springs attach.
• Note whether the chassis is short (6ft 3in) or long (6ft 9in) wheelbase, and check it matches the claimed year and body type.
• Check that the car sits level side to side and front to rear; sagging or cracked springs show here.
• Inspect under the running boards, around the fuel tank area and the floor where it meets the chassis.
• On specials, look for cut, shortened or drilled chassis rails and judge the quality of any welding.

Body, wooden frame and panels

Most Seven bodies are steel, aluminium or fabric over a wooden frame. The wood rots hidden behind trim and panels, and a rotten frame is a bigger job than any panel repair.

• Press the panels gently around door openings, the rear lower body and the scuttle. Panels that give or move suggest rotten wood underneath.
• Check the rear lower corners for cracks. Some flexing is normal on these light bodies, but cracking beyond that is not.
• On Ruby and later saloons, look closely where the running boards meet the rear wings and at the wing mountings.
• On fabric saloons, check the covering for tears, shrinkage and lifting; repairs usually need a specialist.
• Ask who made any new wooden frame and whether photographs of the work exist.

Engine, crank and bearings

The 747cc sidevalve is simple and long-lived when maintained, but the bottom end is the costly area. Many cars have had engine swaps over the years.

• Find out whether the engine is a two-bearing (pre-1936) or three-bearing type and whether that matches the car.
• Listen for rumbling or knocking from the bottom of the engine, which indicates worn bearings or a damaged crank. Guides note this is common on 1936-on engines.
• Ask whether the crank has been crack-tested or replaced with a new uprated crankshaft, and when.
• Look for blue smoke on the overrun or when revved, a sign the engine needs a rebuild.
• Early engines use splash lubrication and show low oil pressure by modern standards; ask a club what is normal for the type rather than assuming a fault.
• Cooling is by thermosiphon with no water pump on most cars, so look for signs of overheating, a slipping fan belt or a blocked radiator.
• Check the engine number, which is normally prefixed M and stamped on the crankcase, against the paperwork.

Gearbox, clutch and axle

Three-speed boxes were used until 1932, then four-speed, with synchromesh added in stages from 1933. Gearboxes are generally robust, but jumping out of gear is common.

• Check every gear engages cleanly and that the lever does not jump out of gear under load or on the overrun.
• Expect some crunching on early synchromesh boxes, which were never strong, and on crash boxes if the driver does not double declutch.
• Listen for whine from the indirect gears and growl from gearbox bearings.
• Check the clutch takes up without slipping or juddering; pre-1936 clutches are sharp by design.
• Listen for rear axle whine or clonks when taking up drive.

Brakes, steering and suspension

Seven brakes are cable-operated drums, and early cars have uncoupled brakes: the pedal works the rears and the hand lever the fronts. Coupled brakes came in 1930 and Girling rod brakes in 1938.

• Confirm whether the car has uncoupled, coupled or Girling brakes and that this matches the year. Ask if any conversion has been done and how.
• Check cables for fraying and stretch, and look for oil or grease on the shoes, a common cause of poor braking.
• Make sure the car pulls up straight. Pulling to one side means at least one brake needs work.
• Jack each front wheel if allowed and check kingpins and wheel bearings for play.
• Look for cracked steering arms and worn joints, and check for excess free play at the steering wheel.
• Check springs for broken leaves, worn shackles and failed rubber shock absorber links.

Electrics and instruments

All Sevens are six-volt. Wiring may be original, renewed or crudely modified.

• Check all lights, the horn and wipers work, remembering six-volt lamps are dim by modern standards.
• Look behind the dashboard for brittle, frayed or bodged wiring, which is a fire risk.
• Note any modifications such as 12-volt conversion, electronic ignition, LED bulbs, flashing indicators or extra brake lights, and whether they are neatly done.
• Confirm whether the car has magneto (pre-1928) or coil ignition and that it suits the claimed year.

Interior and trim

Almost every Seven has been retrimmed at some point, so judge the quality of the work rather than expecting original materials.

• Check seat frames and padding; replacement padding and pneumatic seats are available.
• On Rubys, check the wooden dashboard for splitting and lifting veneer.
• Look at the hood, sidescreens and hood frame on open cars for fit, tears and missing parts.
• Sit in the car with the doors shut to see whether you and your passengers fit.

Paperwork, identity and specials

Sevens were often rebuilt from several cars, and specials may combine parts of many. Identity checks matter as much as mechanical ones.

• Find the chassis number. Its position changed over the years, from the nearside rail on early cars to a riveted plate on the offside rail below the starter on mid-1930s and later cars.
• Find the body number, usually stamped on top of the propshaft tunnel between the front seats, and the engine number on the crankcase.
• Compare chassis, engine and registration numbers with the V5C and look the car up on the Austin Seven Clubs' Association chassis register.
• For a special, ask what it was built from, when and by whom, and whether DVLA was told of structural changes.
• Check whether the car carries a Q registration or has been substantially changed, as this affects MOT exemption.
• For a claimed Ulster or Nippy, ask a club specialist to check chassis and body details before you commit.
• Look for old buff log books, MOT certificates, invoices and photographs that support the history.

Which Austin Seven is best for a first-time owner?

A Ruby or a long-wheelbase saloon is the usual choice. These have coupled brakes, four-speed gearboxes with some synchromesh and more interior space, so they are easier to drive than early cars.

What is the difference between coupled and uncoupled brakes?

On early Sevens the foot pedal works the rear brakes and the hand lever works the fronts. From 1930 the brakes were coupled so the pedal applies all four. Girling rod brakes followed in 1938.

Is the two-bearing or three-bearing crank better?

The three-bearing crank from 1936 is smoother, but both can fail if worn or over-revved. Listen for rumbling and ask about crack testing or a new crank. Condition matters more than type.

How fast is an Austin Seven?

Top speed is roughly 40 to 55mph depending on model, with early cars at the lower end. Comfortable cruising is well below that, so plan routes on quieter roads.

Are Austin Seven parts easy to get?

Yes. Clubs and specialists supply most mechanical parts, body panels, wooden frame parts and even new bodies, and autojumbles are a good source of used parts.

Do Austin Sevens need an MOT?

Most unmodified Sevens are exempt as they are over 40 years old, provided they have not been substantially changed in the last 30 years. Specials and Q-registered cars may not qualify. Owners must still keep the car roadworthy.

How can I tell a real Ulster from a replica?

Check the chassis and body numbers, the lowered chassis details and the history file, and ask a club specialist to inspect it. Replicas are common, and an unproven car should be treated as a replica.