The automatic transmission has become one of the most valued features among modern drivers. Whether for smooth driving, comfort in heavy city traffic, or efficiency on long journeys, the automatic gearbox has evolved from a luxury extra to an essential component. But with so many different technologies and brands, one question remains: which car has the best automatic transmission in the world?
The answer depends on the type of transmission and the driving experience you’re looking for. Still, several models consistently stand out in international performance and reliability tests.
1. Best traditional automatic — Mercedes-Benz 9G-Tronic
Among torque-converter automatic transmissions, the Mercedes-Benz 9G-Tronic is widely considered one of the best available today.
Why it stands out:
- 9 gears for low revs at highway speeds
- exceptionally smooth shifts
- optimized fuel efficiency
- excellent long-term durability
Models such as the C-Class, E-Class and GLC are known for the refinement and flawless behavior of this transmission.
2. Best dual-clutch transmission — Porsche PDK
If performance is the priority, the answer is straightforward: Porsche PDK (Porsche DoppelKupplung).
Key highlights:
- gear changes are almost instantaneous, faster than any manual
- incredible acceleration efficiency
- direct response perfect for sporty driving
- extremely reliable even under intense usage
The PDK is used in iconic models such as:
- Porsche 911
- Cayman
- Boxster
- Panamera
For many experts, it is the best automatic transmission ever engineered.
3. Best automatic for electric vehicles — Tesla single-speed
In electric cars, the best “automatic transmission” is actually a single-speed direct-drive system, used by brands such as Tesla.
Advantages:
- seamless acceleration with no gear changes
- zero vibration
- virtually maintenance-free
- perfect integration with the electric motor
Models like the Tesla Model 3, Model Y and Model S are globally recognized for their instant torque and exceptional smoothness.
4. Best CVT (continuously variable transmission) — Toyota & Honda
For drivers who value comfort, fuel economy and everyday practicality, Toyota and Honda CVTs are the benchmarks.
Strengths:
- extremely smooth operation (no “gear shifts”)
- excellent fuel efficiency
- long service life
- simple maintenance
Popular models include:
- Toyota Corolla
- Toyota C-HR
- Honda HR-V
- Honda Civic
These are the most recommended transmissions for everyday urban driving.
So, which car has the best automatic transmission?
It depends on what the driver values most:
• For ultimate comfort → Mercedes 9G-Tronic
• For maximum performance → Porsche PDK
• For electric cars → Tesla single-speed
• For fuel economy & smoothness → Toyota/Honda CVT
Each dominates its category and represents the peak of modern automotive engineering.