2018 ALL CARS (irrespective of class, 1,664 vehicles assessed)
BEST ALL-AROUND PERFORMANCE CAR OF 2018: Toyota Prius Prime
BEST ENVIRONMENTAL PERFORMANCE CAR OF 2018: Toyota Prius Prime
BEST ECONOMIC PERFORMANCE CAR OF 2018: Mitsubishi Mirage
BEST 5 ALL-AROUND PERFORMANCE (SMALL CAR SEGMENT): Toyota Prius C, Ford Focus Electric, Mitsubishi Mirage, Chevrolet Spark, Toyota Yaris
BEST 5 ALL-AROUND PERFORMANCE (LARGE CAR SEGMENT): Toyota Prius Prime, Hyundai IONIQ (Hybrid/Plug-in), Toyota Prius Eco, Nissan Leaf, Chevrolet Bolt
2018 MINI-COMPACT CARS (106 vehicles assessed)
BEST ALL-AROUND PERFORMANCE: Chevrolet Spark
BEST ENVIRONMENTAL PERFORMANCE: BMW i3
BEST ECONOMIC PERFORMANCE: Mitsubishi Mirage
2018 COMPACT CARS (250 vehicles assessed)
BEST ALL-AROUND PERFORMANCE: Toyota Prius C
BEST ENVIRONMENTAL PERFORMANCE: Ford Focus Electric
BEST ECONOMIC PERFORMANCE: Nissan Versa
2018 MID-SIZE CARS (352 vehicles assessed)
BEST ALL-AROUND PERFORMANCE: Toyota Prius Prime
BEST ENVIRONMENTAL PERFORMANCE: Toyota Prius Prime
BEST ECONOMIC PERFORMANCE: Honda Fit
2018 FULL-SIZE CARS (102 vehicles assessed)
BEST ALL-AROUND PERFORMANCE: Hyundai IONIQ Plug-in
BEST ENVIRONMENTAL PERFORMANCE: Hyundai IONIQ Plug-in
BEST ECONOMIC PERFORMANCE: Hyundai IONIQ Hybrid
2018 WAGONS (27 vehicles assessed)
BEST ALL-AROUND PERFORMANCE: Subaru Outback
BEST ENVIRONMENTAL PERFORMANCE: Volvo V60
BEST ECONOMIC PERFORMANCE: Fiat 500L
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© 2023 Automotive Science Group.
The Automotive Performance Index (API) applies statistical methods to demonstrate each vehicle rating in relative comparison. For example, the vehicle that performs highest in environment performance in a given class obtains a rating score of 100. Each vehicle in its class is then compared relative to the top-performing vehicle with a rating score reflecting the statistical difference in performance outcomes. A score of 91 translates to a 9% environmental performance deficit as compared to the top-performing vehicle.
Due to the API’s relative vehicle rating method, vehicle class divisions were identified as a critical input - these class divisions are detailed here.
While the Automotive Performance Index is indeed an exhaustive list of vehicles to trim level detail, with each vehicle assessment reporting over 200 unique data outputs (the culmination of thousands of data inputs), ASG has taken additional measures to ease the burden of sorting through all data points and all vehicle assessments. We have developed key performance categories and sorted all vehicles in each class according to Environmental Performance, Social Performance, Economic Performance and All-Around Performance. The vehicle in each class with the best score in each unique category is named the performance award winner (i.e. Best Environmental Performance Award winner). The vehicle in each class that scores highest combined scores in Environmental Performance, Social Performance and Economic Performance is named the ASG Best All-Around Performance Award winner.
One step further, we also name the Best 5 All-Around Performance Award winners in each class to provide consumers with a concise product comparison guide.