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Chevrolet Series AD Universal Roadster

Category:

Description

The Chevrolet Series AD Universal Roadster was introduced in 1930 as part of Chevrolet’s continued effort to offer stylish, affordable cars to the American public during a time of economic uncertainty. The Series AD, also known as the Universal, was the successor to the 1929 AC International, and while its changes were largely evolutionary, it retained a strong position in the market due to its solid engineering and updated styling.

The roadster body style was a sporty two-seater with a foldable fabric roof, often equipped with a rumble seat in the rear to accommodate one or two extra passengers. Unlike sedans or coupes, the roadster had no side windows—only removable side curtains—emphasizing its lightweight, open-air design.

Mechanically, the Series AD Universal Roadster featured Chevrolet’s proven 194 cubic inch inline-six engine, also known as the “Stovebolt Six.” It produced around 50 horsepower, a slight increase over the previous model year. This engine was praised for its reliability, simplicity, and relatively smooth performance, helping to maintain Chevrolet’s reputation for value and dependability.

The car came with a three-speed manual transmission and rear-wheel drive, with mechanical brakes on all four wheels. Its 109-inch wheelbase gave it a balanced stance and provided a comfortable ride for its size. The chassis and suspension, with semi-elliptic leaf springs, were typical of the era but robust enough for the road conditions of the time.

Visually, the 1930 Series AD featured updated styling touches, such as a slightly more streamlined body, a new radiator shell design, and a lowered roofline. The roadster model, in particular, had a distinct sporty charm with its exposed fenders, spare tire mounted on the side, and wire-spoke wheels.

Today, the Chevrolet Series AD Universal Roadster is a prized collector’s car, appreciated for its classic 1930s aesthetics, reliable six-cylinder engine, and the carefree spirit of the open-road experience it evokes. It’s a snapshot of an era when cars were becoming not just functional, but stylish expressions of personal freedom.

Additional information

Manufacturer

Chevrolet

Country

USA

Production Started

1930

Production Stopped

1930

Vehicle Type

Bodystyle

Roadster

Number of Doors

2

Number of Seats

2

Top Speed

62 mph (100 kph)

0-60 mph (0-100 kph)

Power

37 / 50 / 49 @ 2600 rpm

Torque

Engine Manufacturer

Chevrolet

Engine

Inline 6

Engine Location

Front

Engine Displacement

3177 cc (193 cu in)

Valvetrain

OHV

Valves per Cylinder

2

Bore / Stroke

84.1 x 95.3 mm (3.311 x 3.752 in)

Compression Ratio

5:1

Cooling System

Water

Charging System

Fuel Type

Petrol

Fuel System

Carburator, 1 x Carter

Aspiration

Normal

Fuel Capacity

Drive

Rear

Transmission

M3

Steering

Front Brakes

Rear Brakes

Front Suspension

Rear Suspension

Tyre Dimensions

Chassis

Weight

1000 kg (2205 lb)

Length

3964 mm (156.1 in)

Width

Height

Wheelbase

2718 mm (107 in)