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McLaren Automotive Speedtail Fuel Economy (MPG)

What is the real-world gas mileage of a 2020 McLaren Automotive Speedtail?

The 2020 McLaren Automotive Speedtail gets up to 15 MPG combined (12 city / 20 highway) in EPA testing.

Latest model year (2020):

The McLaren Automotive Speedtail gets up to 15 MPG combined (12 city / 20 highway) in the Auto (AM-S7), 8 cyl, 4.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
OverviewMPGEngine SpecsFuel CostTransmissionDrivetrainVehicle ClassMaintenance

McLaren Automotive Speedtail MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2020Auto (AM-S7), 8 cyl, 4.0 L8 4.0LPremium Gasoline122015

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

McLaren Automotive Speedtail data analysis

How to read this McLaren Automotive Speedtail data

This page lists every 2020 McLaren Automotive Speedtail record we hold for this measurement — 1 row in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Where these McLaren Automotive Speedtail figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The McLaren Automotive Speedtail record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speedEPA highway specAutoSpecData adjusted MPGFuel you lose
60 mph20 MPG20 MPG0%
65 mph20 MPG18.6 MPG7%
70 mph20 MPG17.4 MPG13%
75 mph20 MPG16.2 MPG19%
80 mph20 MPG15.1 MPG25%

Our Real-World Speed MPG Adjuster re-scales the McLaren Automotive Speedtail EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About Speedtail MPG

What is the MPG of the McLaren Automotive Speedtail?

The McLaren Automotive Speedtail gets up to 15 MPG combined (12 city / 20 highway) in the 2020 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which McLaren Automotive Speedtail trim has the best fuel economy?

The Auto (AM-S7), 8 cyl, 4.0 L trim offers the best combined fuel economy at 15 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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