It's been less than a month since 's new Li ONE was released, and now information about its successor is starting to trickle out.

Li Auto will release a new big SUV in 2022, codenamed X01, with an all-out upgrade over the Li ONE, reported Tuesday.

The new vehicle will ditch the 1.2T three-cylinder engine from Harbin Dongan Auto Engine Co Ltd in favor of a 1.5T four-cylinder engine from Xinchen China Power, the report said, citing a leaked spec sheet.

If true, this would be expected to significantly improve the noise problem of the three-cylinder engine, which has been criticized by some and would make it more competitive with other models using the same extended-range technology.

Voyah, the premium electric car brand of traditional carmaker Dongfeng Motor, said earlier this month that its midsize SUV, the Voyah FREE, is on sale.

The model is available in a version with the same extended-range technology as Li Auto's Li ONE and in an all-electric version, priced at $331,600 ($49,000) and $333,600, respectively.

The company says the Voyah FREE features a four-cylinder engine that delivers a quiet, smooth experience, which is what makes the new extended-range technology, perhaps alluding to its superior technology to the Li ONE.

The specs table from also shows that the Li Auto's X01 model measures 5,150*1,980*1,800, which is larger in length, width, and height than the current Li ONE's 5,023*1,960*1,755.

Its front and rear drive motors are 130 and 200kW respectively, with peak torques of 200 and 450N-m. This gives it a much higher power parameter than the Li ONE, and reduces the 0-100km acceleration time from 6.5 seconds to 5.8 seconds.

It has a 44.5kWh battery capacity and a pure electric range of 155km under WLTC conditions. It also supports fast charging, with a 20-80 percent charge time of 36 minutes.

It has a 65L fuel tank, increasing the WLTC range from 735km to 800km.

Both The X01 and Li ONE will be produced at Li Auto's plant in Changzhou, with an overall annual capacity of 100,000 units. But when the X01 goes into production, its annual capacity will climb to 90,000 units, while the Li ONE's annual capacity will drop to 10,000 units, reported.

The X01 will be equipped with two Journey 3 chips from local chip company Horizon Robotics, 128 lines of LiDAR, five millimeter-wave radars and 12 ultrasonic radars, allowing the model to expand to support L4 autonomous driving, according to the report.

Li Auto launches new Li ONE, standard version costs $1,560 more than current model