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Hybrid cars with the best power-to-weight ratio: Luxury sedans 2025

The less weight each horsepower has to move, the faster a car accelerates. These are the new cars registered in the EU in 2025 with the best power-to-weight ratio.

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  1. 1
    Mercedes-Benz AMG S 63 4Matic+

    Mercedes-Benz AMG S 63 4Matic+

    603 hp · Hybrid · 2,395 kg (5,280 lb)

    3.97 kg/hp

    8.75 lb/hp

  2. 2
    Porsche Panamera Turbo S E-Hybrid

    Porsche Panamera Turbo S E-Hybrid

    591 hp · Plug-in hybrid · 2,448 kg (5,397 lb)

    4.14 kg/hp

    9.13 lb/hp

  3. 3
    Bentley Flying Spur Speed

    Bentley Flying Spur Speed

    591 hp · Plug-in hybrid · 2,720 kg (5,997 lb)

    4.60 kg/hp

    10.14 lb/hp

  4. 4
    Bentley Flying Spur Mulliner

    Bentley Flying Spur Mulliner

    591 hp · Plug-in hybrid · 2,721 kg (5,999 lb)

    4.60 kg/hp

    10.14 lb/hp

  5. 5
    Audi A8

    Audi A8

    453 hp · Hybrid · 2,166 kg (4,775 lb)

    4.78 kg/hp

    10.54 lb/hp

  6. 6
    Audi A7 Sportback

    Audi A7 Sportback

    335 hp · Hybrid · 1,893 kg (4,173 lb)

    5.65 kg/hp

    12.45 lb/hp

  7. 7
    BMW 740i xDrive

    BMW 740i xDrive

    375 hp · Hybrid · 2,250 kg (4,960 lb)

    5.99 kg/hp

    13.21 lb/hp

How it's calculated

Official type-approval data for the new passenger cars registered in the European Union, published by the European Environment Agency. One spot per model (its best version), and only versions with at least 30 registrations, to rule out errors in the records. Ratio = mass in running order (kg) divided by power (hp).

By powertrain, based on each version's official type approval: “Combustion” covers petrol, diesel, LPG, CNG and ethanol; “Hybrids”, both regular and plug-in hybrids; “Electric”, fully electric cars. With a powertrain selected, each model appears with its best version of that powertrain.

Each model's body type (SUV, hatchback, sedan…) and size come from its Wikidata classification and our own review of the best-sellers; models without a type yet only appear under “All”.

Source: European Environment Agency (EEA), “Monitoring of CO2 emissions from passenger cars”, CC BY 4.0 licence. 2025 data (provisional), imported on September 24, 2026. We automatically check for new data every 6 hours (last check: September 25, 2026 at 02:17 PM GMT+2). This is the type-approval data declared by manufacturers and it may contain errors.