Positioned just below the full M3 in the facelifted (LCI) G20 3 Series range, the 2025 BMW M340i xDrive uses BMW's B58 3.0-liter single-turbo inline-six with 48-volt mild-hybrid assistance to make 386 horsepower and 398 lb-ft of torque. Drive goes through an eight-speed Steptronic torque-converter automatic to the xDrive all-wheel-drive system, and BMW quotes a 0-60 mph time of 4.1 seconds with an electronically limited 130-mph top speed. It remains the enthusiast's choice in the mainstream 3 Series lineup, blending sport-sedan pace with everyday four-door usability.
Specifications by source
Each figure carries an evidence mark and a text label; expand a value for its full provenance — citation, verification, test conditions, and any alternate figures.
A. Acceleration
0–100 mph9.50 sIndependent testCar and Driver+–Show full source detail and alternate values
Instrumented road test · Published 20 Mar 2023 · Accessed 22 Jun 2026 · C/D Test Results - 100 mph
Car and Driver instrumented 0-100 mph: 9.5 s for a 2023 M340i xDrive. Same G20 LCI M340i xDrive trim, earlier model year.
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0–60 mphiMethodology noteRollout (1ft) handling differs between testers and manufacturers.4.10 sManufacturer claimBMW+–Show full source detail and alternate values
Instrumented road test · Published 20 Mar 2023 · Accessed 22 Jun 2026 · C/D Test Results - 100 mph
Car and Driver instrumented 100-0 mph braking for the 2023 BMW M340i xDrive: 310 ft. Michelin Pilot Sport 4S tires. Same G20 LCI xDrive trim, older model year.
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C. Dimensions
Ground clearance130 mmManufacturer claimBMW+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as 5.1 in; stored canonically.
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
Inline / 6 cylinders / 24 valves per BMW technical data.
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Engine displacement3.0 LManufacturer claimBMW+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as ; stored canonically.
E. Fuel Economy
Estimated range (city)iMethodology noteEstimated from tank capacity and quoted city economy — not an instrumented range.653 kmCalculated—+–Show full source detail and alternate values
Verified
Originally reported as 652.74991 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (city).
Estimated range (combined)iMethodology noteEstimated from tank capacity and quoted combined economy — not an instrumented range.728 kmCalculated—+–Show full source detail and alternate values
Verified
Originally reported as 728.067201 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (combined).
Estimated range (highway)
F. Performance
Lateral accelerationiMethodology noteSkidpad radius and surface affect results.0.95 gIndependent testCar and Driver+–Show full source detail and alternate values
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
Standard tire on the M340i xDrive 50 Jahre Edition (square 19-inch setup, all-season runflat). The base standard M340i xDrive ships on 18-inch wheels with a staggered fitment; this 19-inch square size reflects the documented trim and may differ from base equipment.
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Rear tire size225/40 R19Manufacturer claimBMW+–Show full source detail and alternate values
10. Weight
Curb weight1818 kgManufacturer claimBMW+–Show full source detail and alternate values
Needs reviewMedium confidence
Originally reported as 4008 lb; stored canonically.
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
BMW-stated curb weight 4,008 lb. Read from the official technical-data table of the M340i xDrive 50 Jahre Edition, which carries the same powertrain/chassis as the standard M340i xDrive; the base trim may differ by a few pounds in equipment. No independently tested curb weight for the standard 2025 trim was located.
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Sources
Backed by 4 source documents. Expand any value for its full provenance — citation, verification, test conditions, and alternate figures.
Contributor mode. Expand any value above to suggest a correction or add another source; the metrics below have no published value yet. Every submission carries a source and is editor-verified before it appears.
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
US rating, 386 hp @ 5,200-6,250 rpm. B58 3.0L turbocharged inline-six with 48-volt mild-hybrid technology (G20 LCI). Figure read from BMW's official technical-data table for the current M340i xDrive.
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Peak torque540 N·mManufacturer claimBMW+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as 398 lb-ft; stored canonically.
iMethodology noteEstimated from tank capacity and quoted highway economy — not an instrumented range.
828 km
Calculated
—
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Verified
Originally reported as 828.490252 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (highway).
Fuel economy (city)iMethodology noteLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.9.0 L/100kmHomologationUS EPA+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as 26 mpg; stored canonically.
Government record · Accessed 22 Jun 2026 · Combined MPG
EPA city rating for the 2025 BMW M340i xDrive.
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Fuel economy (combined)iMethodology noteLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.8.1 L/100kmHomologationUS EPA+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as 29 mpg; stored canonically.
Government record · Accessed 22 Jun 2026 · Combined MPG
EPA combined rating for the 2025 BMW M340i xDrive (3.0 L, premium gasoline, AWD).
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Fuel economy (highway)iMethodology noteLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.7.1 L/100kmHomologationUS EPA+–Show full source detail and alternate values
VerifiedHigh confidence
Originally reported as 33 mpg; stored canonically.
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
Electronically limited top speed per BMW technical data. (Cars equipped with the optional M Sport / track package raise this to 155 mph; the standard limiter is 130 mph.)
Official specification · Accessed 22 Jun 2026 · Technical Specifications – Max output (hp @ rpm)
Standard rear tire on the M340i xDrive 50 Jahre Edition (square 19-inch setup). The base standard M340i xDrive uses a staggered fitment on 18-inch wheels; this reflects the documented trim.
