CARCARETOOL VEHICLE GUIDE

Riley Nine

Riley Nine — open 2-seater; through to; 4-door saloon; in many variations, 1.1 L I4. Explore engine specifications, fuel economy, dimensions, tire sizes, seating, maintenance and tire-pressure guidance.

Engine1.1 L I4

About the Riley Nine

Riley Nine is a open 2-seater; through to; 4-door saloon; in many variations in the convertible class. The available vehicle data lists 1.1 L I4 as an engine configuration. Public source material describes the model in the context of its design, market positioning and vehicle history.

This Riley Nine guide focuses on the details drivers commonly want to know, including engine information for 1.1 L I4. Exact specifications should be matched to the relevant model year and market.

Riley Nine specifications at a glance

Use this table for the model-level essentials. Exact figures may vary by year, trim, engine and market.

Make	Riley
Model	Nine
Model years	Not specified
Body style	open 2-seater; through to; 4-door saloon; in many variations
Vehicle class	convertible
Manufacturer	Riley (Coventry) Limited
Production	1926–1938
Market / country	NL, NZ

Engine, transmission and performance

Engine information for the Riley Nine includes 1.1 L I4.

Engine	1.1 L I4

Dimensions, weight and practicality

Dimensions and capacity figures are presented as published source data when available.

Wheelbase	106 in (2,692 mm)
Width	57 in (1,448 mm)

Riley Nine other specifications

Image	File:Riley Riley Nine Merlin reg jan 37 1056 cc.jpg
Caption	1937 Riley Nine with steel Merlin body by Briggs
Name	Riley Nine

Riley Nine generations and model years

Where a source covers multiple generations, CarCareTool selects the generation(s) that best match this catalog model instead of mixing unrelated variants.

Generation / scope	Years	Engine	Transmission	Drivetrain
Riley Nine	1926–1938	1.1 L I4	Not specified	Not specified

TIRE PRESSURE

Recommended tire pressure for Riley Nine

Check the vehicle placard or owner’s manual for the manufacturer’s cold inflation pressure. CarCareTool estimates are clearly labelled when an exact verified value is unavailable.

Normal load34 PSI front32 PSI rear

Fully loaded36 PSI front35 PSI rear

Load condition	Front	Rear	Status
Normal	34 PSI	32 PSI	Estimate
Fully loaded	36 PSI	35 PSI	Estimate

Calculate how much air to add

Frequently asked questions about Riley Nine

These FAQs are generated automatically for this specific vehicle from the specifications, features and ownership data available in CarCareTool. Questions are selected by relevance so the page focuses on details that can actually be answered for this model.

What engine does the Riley Nine have?

The available source data lists the Riley Nine engine as 1.1 L I4. Engine availability can differ by model year and market.

What tire pressure should I use for the Riley Nine?

For the correct setting, use the cold inflation pressure on the vehicle placard or in the owner’s manual. When CarCareTool does not have a verified configuration-specific value, its starting estimate is 34 PSI front and 32 PSI rear for normal load. This is an estimate, not an OEM recommendation.

What is the best engine oil for the Riley Nine?

There is no single best engine oil for every Riley Nine configuration. Use the viscosity grade and manufacturer approval specified for the exact engine in the owner’s manual.

What body style is the Riley Nine?

The Riley Nine is classified as a open 2-seater; through to; 4-door saloon; in many variations.

What are the dimensions of the Riley Nine?

The available source data lists width 57 in (1,448 mm) and wheelbase 106 in (2,692 mm).

Who makes the Riley Nine?

The manufacturer listed for the Riley Nine is Riley (Coventry) Limited.

When was the Riley Nine produced?

The available source data describes production as 1926–1938.

Where was the Riley Nine built?

The available source record lists assembly information as United Kingdom: Coventry, England.

What class of car is the Riley Nine?

The Riley Nine is listed in the convertible class.

Which markets or countries sold the Riley Nine?

The CarCareTool catalog currently associates the Riley Nine with NL, NZ. Market availability and specifications can differ.

What cars are related to the Riley Nine?

The available source data identifies related models as Riley 12/6. Relationships can vary by market and generation.

How often should I check the tire pressure on the Riley Nine?

Check the tires regularly and before long trips, with the tires cold. Use the vehicle placard or owner’s manual as the source of the manufacturer’s recommended pressure.

Should I use the tire sidewall pressure for the Riley Nine?

No. The maximum pressure printed on the tire sidewall is not automatically the vehicle’s recommended setting. Use the vehicle placard or owner’s manual for the correct cold inflation pressure.

Does the recommended tire pressure change when the Riley Nine is fully loaded?

It can. Many vehicles specify a different cold pressure for heavier loads. Check the vehicle placard or owner’s manual for the exact loading condition.

Can the Riley Nine have different tire pressures front and rear?

Yes. Some vehicles specify different front and rear pressures because axle loads and vehicle configurations differ. Follow the exact vehicle recommendation where available.

Why can mileage differ from the published figure for the Riley Nine?

Published fuel economy is measured under a defined test method. Real-world mileage can vary with traffic, speed, temperature, tire pressure, payload, maintenance and driving style.

Data sources and verification are available in the page editor; exact specifications can vary by year, market, trim and engine.

Riley Nine images

Vehicle images are shown from the stored source image records when available.