Mercedes-AMG CLA 45
2014-2019
The CLA 45 represents AMG's mastery of forced induction, extracting an unprecedented 187.5 horsepower per liter from its hand-built four-cylinder. It proved that downsizing doesn't mean compromising performance, delivering genuine AMG thrills in an accessible package.
Quick Take
The Mercedes-AMG CLA 45 was the world's most powerful production four-cylinder engine when launched. It featured AMG's hand-built 2.0L turbo four producing 375 hp and advanced 4MATIC all-wheel drive system.
Best For
Key Strength
Hand-Built AMG Engine
Watch For
Compromised Daily Usability
The Story
Heritage & Legacy
As AMG's entry into the compact performance segment, the CLA 45 marked a pivotal moment in the brand's evolution toward turbocharged efficiency. It carried forward AMG's 'One Man, One Engine' philosophy while embracing modern downsizing trends.
Design Philosophy
AMG designed the CLA 45 to be an accessible gateway to the AMG experience without diluting the brand's performance DNA. The aggressive body kit, distinctive grille, and quad exhausts signal serious intent despite the compact dimensions.
The Driving Experience
Engine Character
The M133 engine delivers immediate turbocharged punch with minimal lag, feeling more like a small V8 than a traditional four-cylinder. Its linear power delivery and distinctive growl create an addictive character that encourages spirited driving.
Chassis Dynamics
The 4MATIC all-wheel drive system and AMG-tuned suspension deliver impressive grip and stability, though the front-biased platform shows its limits at the extreme. The steering is precise and the chassis rewards an aggressive driving style.
Sound Signature
The CLA 45 produces an aggressive, crackling exhaust note that's distinctly AMG, with pops and burbles on overrun that belie its four-cylinder configuration.
Strengths & Tradeoffs
Defining Strengths
The M139 2.0L turbo four produces an incredible 375hp, making it the most powerful production 4-cylinder at the time. Each engine is hand-assembled by a single technician in Affalterbach, ensuring exceptional build quality and character.
The sophisticated AWD system can send 100% of torque to the rear wheels in Race mode, enabling proper drift capability. The system dramatically improves track times while maintaining all-weather usability that rear-drive competitors can't match.
Honest Tradeoffs
The suspension is punishingly stiff for daily driving, and the rear seats are essentially unusable for adults. Road noise and harsh ride quality make longer journeys uncomfortable compared to more refined alternatives.
While AMG-specific touches are excellent, base Mercedes materials show through in places like hard plastics and cheap-feeling switchgear. The infotainment system from this era feels dated compared to modern standards.
Ideal Owner
Perfect for enthusiasts who want genuine AMG performance with daily usability and a more accessible price point than traditional V8 AMGs.