WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Alfa Romeo 4C (incl. Spider)?

ASStreetSSTStreet Touring

A stock 2015–2020 Alfa Romeo 4C (incl. Spider) runs in AS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within SST tire and wheel limits), it runs SST.

From the 2026 rulebook (Appendix A)

Street: '4C (incl. Spider) (2015-20)' = AS. ST: '4C (incl. Spider) (2015-20)' = SST.

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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.