Become a Member: Get Ad-Free Access to All Our Content
1921→1926 Pierce-Arrow Series 33

1921→1926 Pierce-Arrow Series 33

1921→1926 Pierce-Arrow Series 33

In 1921, Pierce slight revised their Model 32 into the Series 33 which would be produced until 1926. It was the ultimate version of Pierce-Arrows huge six-cylinder engine with the ‘Dual-Valve’ cylinder head.

The engine made great use of a twin-spark setup with twin coils, distributors and spark plugs. A switch on the dashboard could turn on either bank of plugs.1

From earlier models, the Series 33 rode on Westinghouse air-spring shock absorbers that relied on a Kellogg air pump driven off the transmission.1

Later refinements to the series included vacuum assisted brakes and a single 14-tower distributor.1

Sources & Further Reading

1. The Pierce-Arrow Society. The Roaring Twenties.

1921→1926 Pierce-Arrow Series 33

In Detail

type Series Production Car
production years 1921 – 1926
price $ $ 6,500
engine Dual-Valve Inline-6
position Front, Longitudinal
aspiration Natural
ignition Delco Dual-Ignition System
block material Cast Iron in Pairs
valvetrain SOHC, 4 Valves per Cyl
displacement 6784 cc / 414 in³
power 74.6 kw / 100 bhp
specific output 14.74 bhp per litre
top speed ~120.67 kph / 75 mph