On July 19, in the 2024 "Lei Jun Annual Speech", the official picture of the Xiaomi SU7Ultra prototype was officially released. It is reported that the Xiaomi SU7 Ultra prototype is equipped with two V8s motors and a V6s motor, with a maximum power of 1548 horsepower and a 0-100 km/h acceleration time of 1.97 seconds.
In terms of space, the three-dimensional length, width and height are 5260mm, 2064mm, 1406mm, and the wheelbase is 3000mm, which is 300mm longer than the Xiaomi SU7 in size, 101mm wider, and 34mm shorter, which is lower and wider.
In terms of power, three motors are used, a combination of two V8s + one V6s, with a total power of 1548ps, surpassing many supercars, bringing 0-100km/h acceleration of 1.97s (including starting time), 0-200km/h acceleration of 5.96s, 0-300km/h acceleration of 15.07s, and a top speed of more than 350km/h.
It is reported that the V8s motor adopts two-way full oil cooling and S-shaped three-dimensional oil circuit design, and the stator part is further increased through the double-cycle three-dimensional oil circuit; The rotor part uses an S-shaped oil circuit to increase the heat dissipation area simultaneously. In addition, the stator silicon steel lamination also adopts a "stepped" dislocation design, which can increase the effective heat dissipation area by 7%.
In order to maximize the track capacity, the Xiaomi SU7 Ultra prototype also built an aerodynamic design, specially designed fixed racing large rear wing, large tail diffuser, front and rear open wheel arches, super large front lip, front wheel diffuser, U-shaped air knife, etc., together to bring a maximum of 2145kg of vehicle downforce, such a strong downforce greatly improves the handling stability of the vehicle, and plays a vital role in the improvement of track lap time.
In addition, in order to meet the higher power needs of the three-motor system, the car will be equipped with CATL's second-generation Kirin battery, which can support a maximum discharge power of 1330kW, a peak voltage of 897V and a power density of up to 3075W/kg, and through a thinner pole piece design, it can still output a maximum power of more than 800kW even at a low power of 20%, ensuring that the second half of the New North Circuit can still have a stable high-power output.
Lei Jun said that the impact on New Zealand is divided into two steps, first of all, he will use the prototype car to pick the non-production lap list in early October, and challenge the mass production lap list in 2025. Challenging Porsche is our dream at Xiaomi. We have a big gap with Porsche, but it doesn't matter. As long as we start playing catch-up, we're on our way to winning.