The Renault 24cv models PI and PZ were produced as 1927 and 1928 models only. The cars were made to distributor order and as sales were very low production was small. Both featured the new three spring rear suspension

Rear suspension

For front-wheel drive cars, rear suspension has few constraints and a variety of beam axles and independent suspensions are used.For rear-wheel drive cars, rear suspension has many constraints and the march to the superior but more expensive independent suspension layout has been a long slog...

 that provided much improved roadholding and handling. The 6 cylinder motor (85 x 140) was also uprated to 85 hp and a four speed gearbox fitted. Other running gear

Running gear

The term running gear is used to describe the wheels, suspension, steering, powertrain & chassis/bodyshell of a motor-car or automobile, or the tracks and road wheels of a tank or similar tracked vehicle....

, including the servo brakes were identical to the 40cv which had the 110 x 160 motor. This was the last model year

Model year

The model year of a product is a number used worldwide, but with a high level of prominence in North America, to describe approximately when a product was produced, and indicates the coinciding base specification of that product....

 of the 6 cylinder large cars.

The PI were the open cars on short and long chassis

Chassis

A chassis consists of an internal framework that supports a man-made object. It is analogous to an animal's skeleton. An example of a chassis is the underpart of a motor vehicle, consisting of the frame with the wheels and machinery.- Vehicles :In the case of vehicles, the term chassis means the...

. PZ were closed cars on long or very long chassis. All were available with two side mounted spare wheels or the signature dual rear mounted wheels to emphasize the long bonnet.