Alvis Speed 20 Buying Guide

Buy a Speed 20 or Speed 25 on documented straight-six files and honest Alvis paperwork first. All-synchromesh folklore still sells, but a soft Charlesworth pack or vague leftover claim rewrites the budget fast.

For this November 6, 2026 guide I read Car Collector International: Alvis Speed 20 Speed 25 guide and Wikipedia: Alvis Speed 20. The mechanical cautions below come from those pages; the order of checks and the questions for the seller are my own practical recommendations. Any price figures in those sources are market snapshots, not a valuation of the car in front of you. So, compare it with recent sales of the same specification and condition. I also kept the advice to things you can see, hear or ask for on a viewing day. If a seller rushes you past a cold start or blocks a lift inspection, treat that as a signal and walk away before you spend report money.

Know Speed 20 and Speed 25 families carefully

CCI dates the Speed 20 about 1932-1936 with about 1,165 cars and the Speed 25 about 1936-1940 with about 391 cars. Pick a documented car before you travel.

Ask about straight-six and gearbox invoices

CCI wants continuous specialist files. Ask for the last invoice by shop and date.

Confirm IFS and synchromesh claims carefully

CCI treats independent front suspension and all-synchromesh gearboxes as meaningful markers. Match Alvis paperwork before you bid.

Inspect Charlesworth coachwork carefully

Soft timber or panel repairs rewrite the budget. Photograph undertrays.

Keep a dated note of the cold start

Write idle quality, gearbox engagement and any smoke. Our cold-start test guide helps you brief that first start.

Prefer continuous Alvis specialist files

CCI puts books and specialist invoices high on the list. Photos beat handshake stories.

Confirm Speed 20 and Speed 25 identity carefully

CCI dates the Speed 20 about 1932-1936 with about 1,165 cars and the Speed 25 about 1936-1940 with about 391 cars. Match Alvis paperwork before any leftover claim.

Ask about straight-six invoices carefully

CCI wants continuous specialist files. Ask for the last invoice by shop and date.

Inspect Charlesworth coachwork carefully

Soft timber or panel repairs rewrite the budget. Photograph seams before the bay is cleaned.

Keep a dated note of the cold start

Write idle quality, gearbox engagement and any smoke. Our cold-start test guide helps you brief that first start.

Photograph tyre date codes and brake wear

Fresh stickers on old rubber still fail a real ownership budget. Write the DOT week and drum condition.

Ask who can still support the car locally

Confirm an Alvis specialist booking window before you send a deposit.

Prove the identity before a deposit

Match the chassis number on the Alvis Speed 20 Speed 25 to the title, any import papers and the plate on the car before you order a history report. Our VIN verification guide walks through that match, and imported-car report coverage sets expectations for cars that spent years overseas. Older chassis numbers may sit outside modern report databases, so confirm coverage before paying. NMVTIS covers U.S. title history only; it cannot replace foreign records or a physical inspection.

Get the repair scope in writing first

If the six-cylinder or coachwork story looks soft, get an Alvis specialist written estimate before you go further. Look, a seller PDF or a folder of photos is a starting document, not independent proof of condition. Ask the inspector for written findings with local estimates, split into safety work and cosmetic wishes. The NYC consumer-agency used-car guidance tells buyers to have an independent mechanic check the car, and our pre-purchase inspection checklist helps you set the scope. Keep a dated note of the drive, the temperatures and any noises, because a seller who disputes your findings later will ask what you saw and when. Keep copies of texts and emails with the seller in the same folder as the PPI write-up so the timeline stays clear.

We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. Guest reports have been about $5.50, member reports about $4.50 and a two-report bundle about $6.75; confirm the price at checkout because it can change. A report can miss unreported work, so keep the inspection appointment even when the history looks quiet.

Sources

• Car Collector International: Alvis Speed 20 Speed 25 guide
• Wikipedia: Alvis Speed 20
• U.S. Department of Justice: NMVTIS
• NYC DCWP: used-car buying tips