In 1930, Buick offered several models organized into series. Here's a list of the 1930 Buick models along with a brief description of each:

1. Buick Series 40: The Series 40, also known as the Model 40, was the entry-level Buick model. It was powered by a 5.7-liter inline-6 engine that produced 80 horsepower. The Series 40 was available in several body styles, including a 2-door coupe, 2-door sedan, 4-door sedan, and 4-door convertible phaeton.

2. Buick Series 50: The Series 50, or Model 50, was positioned above the Series 40 and also used a 5.7-liter inline-6 engine, producing 80 horsepower. The Series 50 was available in various body styles, such as a 2-door coupe, 4-door sedan, 4-door convertible phaeton, and 4-door convertible sedan.

3. Buick Series 60: The Series 60, or Model 60, was a more luxurious offering in the Buick lineup. It featured a more powerful 5.9-liter inline-8 engine producing 99 horsepower. The Series 60 was available in several body styles, including a 2-door coupe, 4-door sedan, 4-door convertible phaeton, and 4-door convertible sedan.

4. Buick Series 80: The Series 80, also known as the Marquette, was a premium Buick model. It was powered by a 5.9-liter inline-8 engine generating 104 horsepower. The Series 80 was available in a range of body styles, such as a 2-door coupe, 4-door sedan, 4-door convertible sedan, and 4-door limousine.

5. Buick Series 90: The Series 90, or Model 90, was the top-of-the-line Buick model in 1930. It was equipped with a 5.9-liter inline-8 engine that produced 104 horsepower. The Series 90 was offered in multiple body styles, including a 2-door coupe, 4-door sedan, 4-door convertible sedan, 4-door limousine, and 7-passenger 4-door limousine.

These descriptions provide an overview of the 1930 Buick models. Each model was available in various body styles and trim levels, offering a wide range of options for buyers at the time.

In 1930, Chevrolet offered two main models: the Universal Series AD and the Independence Series AE. Both models featured a range of body styles and configurations. Here's a brief description of each:

1. Chevrolet Universal Series AD: The Universal Series AD was Chevrolet's entry-level offering in 1930. It was powered by a 3.2-liter inline-6 engine, known as the "Stovebolt Six," that produced 50 horsepower. The Series AD was available in a variety of body styles, including a 2-door roadster, 2-door coupe, 2-door sport coupe, 2-door coach, 2-door sedan, 4-door sedan, 4-door Phaeton, and 2-door convertible cabriolet. The Universal Series AD also had a commercial lineup, which included a pickup truck, panel truck, and canopy express truck.

2. Chevrolet Independence Series AE: The Independence Series AE replaced the International Series AC and was built on a new chassis. Like the Universal Series AD, the Independence Series AE was powered by the same 3.2-liter inline-6 "Stovebolt Six" engine producing 50 horsepower. The Series AE was available in a range of body styles, including a 2-door roadster, 2-door coupe, 2-door sport coupe, 2-door coach, 2-door sedan, 4-door sedan, 4-door Phaeton, and 2-door convertible cabriolet. The Independence Series AE also had a commercial lineup, which included a pickup truck, panel truck, and canopy express truck.

   
   

Both Chevrolet models offered in 1930 were designed to provide affordable and reliable transportation. They featured a sturdy construction, updated styling, and the performance of the "Stovebolt Six" inline-6 engine, which remained a mainstay in Chevrolet vehicles for many years to come.