One of Tesla's oldest vehicles, the Model X, hasn't gotten all that much attention of late. The refreshed Model S sedan has dominated headlines with its record-breaking acceleration in Plaid guise, while the Model Y and 3 continue to sell in droves.

Just last week, Hertz announced it would be ordering 100,000 Model 3s. But the Model X is still a formidable SUV and the refreshed model is even better than we thought. On Twitter, the account known as @tempermanant has shared some key Model X improvements gleaned from Tesla's application documents to the EPA.

Compared to the 2020 Tesla Model X Long Range Plus, the 2021 Model X Long Range is over 30 percent more powerful. Previously, the front and rear electric motors produced 241/253 horsepower respectively.

Those numbers are now up to 326 hp for the front motor and 333 hp for the rear one. An interesting change is that the rear electric motor has switched from an AC induction type to an AC permanent magnet type. The bump up in power isn't the only improvement, as the latest Long Range model has a 14% reduction in battery weight, a 13% increase in battery-specific energy, and a 4% drop in curb weight.

Previously, the electric SUV weighed 5,437 pounds, but that has dropped to 5,219 lbs for the 2021 version. Documentation for the high-performance Model X Plaid is not yet available, but according to Tesla's website, this tri-motor model will have a 0-60 mph time of only 2.5 seconds and a top speed of 163 mph. If you have a Lamborghini Urus, you'll need miles of road before you'll catch up to the Model X Plaid.

By comparison, the dual-motor Model X needs 3.8 seconds for the benchmark sprint and has a 155-mph top speed, along with an estimated range of 351 miles. Subtle styling enhancements and a redesigned interior are other changes implemented for the latest Model X, but it's Tesla's ability to squeeze unbeatable performance from its EVs that remains especially impressive.