Bugatti
Chiron
Lamborghini
Sian
Bugatti Chiron vs Lamborghini Sian: 2021 Comparison
The short answer
The Bugatti Chiron offers power, while the Lamborghini Sian excels at fuel economy instead. Choose the Bugatti Chiron if you prioritize power in daily driving, or the Lamborghini Sian if fuel economy matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
Chiron
Overall
Extremely positive sentiment overall, with the vehicle universally praised as a monumental engineering achievement. It is described as the perfect evolution of its predecessor, offering a 300+ mph (483+ km/h) top speed capability, immense high-speed stability, and significant dynamic improvements over earlier models. The Chiron is celebrated for being both an incredibly fast hypercar and a comfortable, luxurious grand tourer, capable of being driven by anyone.
Best version to buy
Chiron Super Sport 300+ is specifically highlighted for its top speed credentials and performance figures. The Chiron Sport and Chiron Pur Sport are also mentioned in comparative lists, but insufficient data exists to declare a consensus "best" version.
Known issues
- ⚠Extremely high maintenance and service costs: cited as approximately €50,000 ($54,000 USD) per year for basic upkeep, with service charges described as 5x higher than some competitors. Frequency: recurrent.
- ⚠Tire durability concerns: tires reportedly cracking after approximately 4,000 km (2,485 miles) and wearing out in as little as 20 miles (32 km) when driven at top speed. Frequency: recurrent.
- ⚠Radiator design flaw: mentioned as a cause of constant radiator issues related to the W16 engine layout. Frequency: isolated.
Sian
Overall
Sentiment is overwhelmingly positive, focused on the vehicle's status as an exclusive, technologically significant flagship. The Sian is universally recognized as a rare, multi-million dollar hypercar with a production run of only 63 coupes and 19 roadsters to honor Lamborghini's founding year. Owner and enthusiast discussions are dominated by admiration for its dramatic, angular design, though some find the aesthetic divisive or a continued evolution of the established Aventador silhouette.
Best version to buy
Insufficient owner data available to distinguish between coupe and roadster variants based on driving experience. All discussions reference the vehicle's exclusivity and technological premise rather than comparing trim or configuration choices.
Known issues
- ⚠Design language considered derivative or ugly by some: recurrent criticism that the Sian's design is a variation of the existing Aventador/Gallardo silhouette, lacking novelty. Frequency: recurrent.
- ⚠Hybrid system perceived as insignificant: skepticism that the 34 hp electric motor provides a meaningful performance benefit, especially compared to hybrid systems in competitors like the LaFerrari. Frequency: recurrent.
- ⚠Perceived inheritance of Aventador platform flaws: isolated mention that the Sian carries over potential drawbacks from the Aventador, including its weight and gearbox characteristics. Frequency: isolated.
The verdict
The Lamborghini Sian is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Bugatti Chiron, based on the data above. If power matters more to you than running costs, the Bugatti Chiron is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Bugatti Chiron or the Lamborghini Sian?
Owner reports show similar reliability sentiment for the Bugatti Chiron and the Lamborghini Sian. Check the known issues listed above for specific differences between the two.
Which is better for families, the Bugatti Chiron or the Lamborghini Sian?
Both seat a similar number of passengers based on our data. The Bugatti Chiron is classed as a Coupe, the Lamborghini Sian as a Roadster, which affects cargo space and ride height for family use.
Which has better fuel economy, the Bugatti Chiron or the Lamborghini Sian?
The Lamborghini Sian is more fuel-efficient on paper: 18.5 L/100km combined versus 21.5 L/100km for the Bugatti Chiron, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Bugatti Chiron or the Lamborghini Sian?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Bugatti Chiron than the Lamborghini Sian. See the known issues comparison above.