Alan Henry Spenner (7 May 1948 – 11 August 1991) was a British bass player who performed with Wynder K. Frog, The Grease Band, ABC, David Coverdale, David Soul, Joe Cocker, Lynda Carter, Peter Frampton, Ted Nugent, Mick Taylor, Murray Head, Kokomo, Roxy Music, and played on the original 1970 concept album Jesus Christ Superstar.
Spenner played bass live at Woodstock in 1969 with Joe Cocker and the Grease band, seen on The Woodstock Directors Cut DVD, and the Roxy Music DVD The High Road, filmed live in Fréjus, France, during August 1982.
He typically played Fender Precision, Fender Precision Fretless and Wal electric basses through an Ampeg amplification system. His Wal bass was a 78 JG Series that, coupled with his playing style, provided a signature sound heard on many Roxy Music songs, such as "Same Old Scene" and "Avalon".
Spenner died on 11 August 1991 of a heart attack at the age of 43.
Spenner's son, Henry Spenner, is the former drummer for the group Fields.