2021 BMW 4 Series Specifications Overview

The 2021 BMW 4 Series is certified across 5 configurations with 2L 4-Cylinder Engine, 3L Gas-Electric Hybrid Engine powertrain options. Available drivetrain layouts include Rear-Wheel Drive, All-Wheel Drive paired with Automatic (S8). EPA classified under the Subcompact Cars size category. Platform architecture belongs to the 2nd Generation (G22/G23/G26) vehicle family.

Engine / Motors
2 Options
2L 4-Cylinder Engine, 3L Gas-Electric Hybrid Engine
Drivetrain Options
2 Drivetrains
Rear-Wheel Drive, All-Wheel Drive
Transmissions
S8
Automatic (S8)
Vehicle Classification
Subcompact Cars
Official EPA regulatory class

Certified Powertrain & Transmission Configurations (5)

Official laboratory certification specifications for each factory engine, transmission, and drivetrain permutation

Configuration / Model Engine & Displacement Cylinders Induction / Tech Transmission Drivetrain Fuel System
430i Coupe Subcompact Cars 2L 4-Cylinder Engine 4 Naturally Aspirated Automatic (S8) Rear-Wheel Drive Premium
430i xDrive Coupe Subcompact Cars 2L 4-Cylinder Engine 4 Naturally Aspirated Automatic (S8) All-Wheel Drive Premium
430i Convertible Subcompact Cars 2L 4-Cylinder Engine 4 Naturally Aspirated Automatic (S8) Rear-Wheel Drive Premium
M440i Convertible Subcompact Cars 3L Gas-Electric Hybrid Engine 6 Hybrid Electric Assist Automatic (S8) Rear-Wheel Drive Premium
M440i xDrive Coupe Subcompact Cars 3L Gas-Electric Hybrid Engine 6 Hybrid Electric Assist Automatic (S8) All-Wheel Drive Premium
EPA Certification Standards: Powertrain and transmission specifications represent official laboratory configuration records filed under 40 CFR Part 600. For detailed fuel economy ratings, electric range, and annual fuel costs, explore the 2021 BMW 4 Series MPG & Range Report.

Regulatory Classification & Safety Architecture

Federal classification standards and standard active driver assistance system capabilities

EPA Regulatory Size Class

  • Subcompact Cars

NHTSA NCAP Body Formats

  • 2021 BMW 4 Series Convertible C AWD
  • 2021 BMW 4 Series 2 DR AWD
  • 2021 BMW 4 Series Convertible C RWD
  • 2021 BMW 4 Series 2 DR RWD

Active Safety Technology

Evaluated under federal safety compliance standards.

Related Official Reports for 2021 BMW 4 Series

Cross-reference fuel economy, safety ratings, owner defect complaints, and recall notices

Official US Government Data Provenance

Powertrain, transmission, drivetrain, and regulatory classification specifications on this page are derived directly from the United States Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) official laboratory certification registries.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.