A frustrated Fe▨rnando Alonso has launched a damning assessment of McLaren partner and engine supplier Honda by declaring it is 'not ready to win' with a power unit that is losing upwards of 30k🦂m/h in a straight line.

Beset with engine-rel💛ated issues since pre-season testing began in Spain last week, though the MCL32 completed 46 trouble-free laps with Alonso behind the wheel today, it served to demonstrate its evident lack of power and top speed relative to rivals.

Arguably an even bigger embarrassment to Honda than the poor reliability following the move to re-d✃esign almost the entire power unit ahead of the 2017 season, while Alonso is relatively happy with his McLaren chassis itself, he says the lack of top speed is hurting.

"The chassis everything feels good, everything feels under control. The car is responding well to changes and every🐟thing is working fine. I'm happy with the balance, I'm happy with how I attack the corner. I'm enjoying driving this cꦰar, so I don't think that we are too far back in terms of chassis side.

"We have only one problem: that is the power unit. There is no reliability and there is no power. I think we are 30 km/h down on every straight. When you are 30 km/h down on every st꧑raight, it is difficult also to have a feeli🐻ng on the car. Everything feels good, but when you arrive to normal speed you don't know what is going to happen."

Re🧸vealing he expects an 'immediate reaction' from the team, Alonso goes on to clarify that he is referring to Honda solely, rather than 𓆉McLaren.

"Well it'♉s more a ques🦩tion for Honda. I have a lot of time. As I said, I am enjoying [it], I am preparing myself better than ever.

"I feel really strong driving this year with these cars, I can do also my driving style, my quick input on the steering wheel𝓰 on entry in the old days, so I'm really enjoying. I'm feeling very strong, I'm feeling ಌthe strongest here, but I don't have the power. I have a lot of time."

With one day remaining in the c🌠ar, Alonso has called on t🅠he team to pull together to ensure it can end testing without troubles to get a better idea of whether it can unlock more performance.

"Let's get together with Honda, push ahead togeth🏅er, because I b𒆙elieve we have potential to do a lot better than what we're doing now. We can't be 30/40 kph slower down the straights.

"If they have any problem, if there are differences between what happens in the test benches 𒀰and on the track, whatever is ha𝄹ppening, we have to overcome that together and complete as many laps as possible on the last two days of testing.