Johannes Eisele | AFP | Getty Images
A Tesla Model S P85d car is displayed at the Shanghai International Automobile Industry Exhibition on April 20, 2015.
So what did Tesla improve with the high-performance Model S?
A big change is the addition of a second motor, giving the P85D dual motors and turning the single-motor, rear-wheel drive Model S into an all-wheel drive electric car that is more responsive and efficient.
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"When we tested the first Model S it went zero to 60 in 5.6 seconds. The P85D goes 0 to 60 in 3.5 seconds. That's incredible, " Fisher said.
For Tesla, the review is further validation of CEO Elon Musk's drive to build an electric car that can also deliver an incredible driving experience. Critics scoffed at Musk's vision as he was building the Model S; but Fisher said the team at Tesla deserved credit for delivering a car with very few flaws.
"Let's be frank, this car is $130, 000, " he said, meaning that a lot of people won't be able to afford it. "But this is a glimpse into the future of the automotive industry. A glimpse where cars can be extremely efficient, and extremely fast, and extremely comfortable."
Though Consumer Reports gave the P85D a perfect score, it was careful not to call it a perfect car. Fisher said the time it takes the vehicle to fully recharge (which can be about 30 minutes) is an issue that Tesla still needed to tackle.
He's also not crazy about the instrument panel between the front seats, which features a screen the size of iPad that also includes a web browser. "I think maybe Tesla went a bit too far with that, " he said.
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Fisher admitted, though, that in complaining about the instrument panel he was getting picky about a car Consumer Reports owns and will likely continue to test, as Tesla improves the Model S with over-the-air software updates in the future.
Until then, Fisher said the P85D is in an class all its own.
"There's no other product that scores a 100 at Consumer Reports. It's unlike anything we've ever seen, " he said.