A new Tesla electric car has earned the best-ever vehicle rating from Consumer Reports, sending shares of the automaker racing higher.
The new Tesla P85D "performed better in our tests than any other car ever has, breaking the Consumer Reports Ratings system", said Mark Rechtin, automotive editor for the consumer group.
"With a six-figure price tag, the P85D is expensive, meaning its virtues will be experienced by a rare few. But its significance as a breakthrough model that is pushing the boundaries of both performance and fuel-efficiency is dramatic."
The four-wheel drive P85D, which is a modified version of the Tesla S sedan, will cost upwards of US$125,000 with typical equipment, Consumer Reports noted.
But the group said the breakthroughs suggest positive things for the sector, with Tesla due to introduce its Model X crossover in 2016, followed in 2018 by a "more attainable compact sedan", the Model 3, estimated to start at about US$35,000.
Consumer Reports gave the P85D a 100/100 rating, topping the 99/100 rating of the Tesla S two years ago.
Rechtin said the vehicle "initially scored 103 in the Consumer Reports' Ratings system, which by definition doesn't go past 100... so we had to make changes to our scoring to account for it".
Tesla shares jumped 8 percent in US midday trade to US$243.01, extending the spectacular market performance of the carmaker, which produces only a small number of coveted vehicles.
Earlier in August, Tesla reported a quarter loss of US$184 million as the electric carmaker geared up for expansion.
Tesla plans to invest about US$1.5 billion this year to expand production capacity, construct its huge "Gigafactory" for batteries and expand its network of charging stations.
Tesla is also gearing up for a new project to adapt car batteries to store power in homes and businesses.