WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Fiat & Bertone X1/9?

ESStreet

A stock 1974–1987 Fiat & Bertone X1/9 runs in ES (Street) under the 2026 SCCA Solo Rules.

From the 2026 rulebook (Appendix A)

Street: 'X1/9' = ES (years approximate; listing has none). No ST listing found.

Unofficial guidance verified against the 2026 SCCA® Solo® Rules — always confirm against the current rulebook before competing. Classing data cites the exact Appendix A wording it relies on.