2021 Subaru Legacy Specs

2 powertrain configurations on federal record for the 2021 Subaru Legacy: 2.5L 4-cyl Regular Gasoline; 2.4L 4-cyl Regular Gasoline, rated up to 30 MPG combined by the EPA.

Source: EPA federal records (fueleconomy.gov) · Updated 2026-10-26 · By CarWhere Research

2021 Subaru Legacy engines, transmissions, drivetrains and EPA gas mileage
Engine	Transmission	Drivetrain	City	Highway	Combined
2.5L 4-cyl Regular Gasoline	Automatic (AV-S8)	All-Wheel Drive	27	35	30
2.4L 4-cyl Regular Gasoline	Automatic (AV-S8)	All-Wheel Drive	24	32	27

Legacy by year

2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990

Buying a used Legacy? Specs are the easy half.

Check which Legacy years to avoid (federal complaint and recall records), then check the specific car: the Full VIN Report shows that VIN's factory build, recall record, and market history before you pay for it.

Frequently asked questions

What engines does the 2021 Subaru Legacy have?

2 engines on federal record: 2.5L 4-cyl Regular Gasoline; 2.4L 4-cyl Regular Gasoline, offered with Automatic (AV-S8) and All-Wheel Drive. The full per-configuration table is above.

What gas mileage does the 2021 Subaru Legacy get?

EPA combined ratings run 27–30 MPG depending on configuration — the table above shows city/highway/combined for each engine, transmission, and drivetrain.

Is 2021 a good year for the Subaru Legacy?

Specs don't answer that — the federal complaint and recall record does. See the Subaru Legacy year-by-year reliability verdicts at carwhere.com/research/years-to-avoid/subaru/legacy, built from NHTSA data.

How do I get the specs for my exact VIN?

These are the federal-record configurations for the 2021 Subaru Legacy overall. For one specific vehicle — its exact engine, trim, factory options, and original window sticker — decode the 17-character VIN free at carwhere.com/tools/vin-decoder.

Where does this data come from?

The U.S. EPA's public vehicle dataset (fueleconomy.gov) — the federal record of every US-market configuration since 1984 — refreshed 2026-10-26. Public-domain data; republish with attribution to CarWhere (carwhere.com).