Classic and vintage car logbook
The full picture of a car worth caring about
Underbonnet gives your classic the logbook it deserves. Record every job — whether you turned the spanners yourself or handed the car to a specialist — track fitted parts, log your day trips, and build a permanent service history you can export whenever you need it.
From the workshop to the Sunday run — nothing gets lost.
Built for owners who want to really know their car
Classic and vintage cars deserve better than a scrawled notebook or a folder of invoices you can never find. Underbonnet is a structured, permanent record — every job completed, every observation noted, every part catalogued with its number and serial — so the full state of what you own is always clear.
It doesn't matter whether you're under the car yourself or collecting it from a specialist. What matters is that you're the keeper of that knowledge. Underbonnet makes it easy to build that record over time, and straightforward to hand on if the car ever changes hands.
A record that earns its keep
Every job your car has had — outstanding or done — sits in one place with dates, mileage, notes, and photos. Build a fitted-parts catalogue as you go. When you need a Service Log PDF, it's already there waiting.
Nothing left to chance
Set recurring maintenance schedules and Underbonnet surfaces the jobs before they become problems. Log observations as they occur. The full picture stays current — not just what you happen to remember when it matters.
Road as well as workshop
Record fuel stops, day trips, and runs out alongside your maintenance history. Attach photos from the road as well as the garage. Your mileage builds a timeline of the car in use — not just the work done on it.
From a 1926 Singer to an '89 Golf GTI — Underbonnet is for any car that deserves a proper record.
Account
Start your logbook
Free to use during the beta — no card required. Enter your email and we'll send a sign-in link.