we can see that RM Naruto's unenhanced running speed is equal to V1 A's Shunshin speed.
This is a credible conclusion as Naruto and the Raikage both started moving at the same time and stopped at the same times. We even get a comparison of jumping speed and running movement speed. Neither gained the upper hand in movement.
Later we see RM Naruto using unenhanced running speed and effortlessly matching Edo Itachi's Taijutsu and Shunshin speeds. This further cements that
RM Naruto (unenhanced) = V1 A (Shunshin) > Itachi (Shunshin)
Later in Naruto and the Raikage's encounter A decides that he's going to test Naruto.
we can see in the top panel that Naruto is still using unenhanced running speed. Now the part I want you to focus on is the the timing of Naruto and The Raikage's movements.
We'll name the bottom right hand corner of that panel Y
we can see when Naruto actually dodges the Raikage.
We'll call the largest panel in that scan where Naruto is saying "I won't fail" Z.
In Panel Y we can see that the Raikage is already moving at full speed while Naruto is still at a light trot. The Raikage's is practically touching Naruto when Naruto uses Shunshin. Naruto then proceeds dodge A's punch an appear behind him.
This alone makes him substantially faster than A due to the fact that Naruto dodged A's punch at point blank. We can delve further into the scan and see that the gap between Naruto and A is actually quite large.
Back to panel Y
. Notice the distance between Naruto and the rocks behind him. This is the distance that the Raikage covers from the time Naruto begins Shunshin till the time Naruto comes to a stop.
In Panel Z
we can see that the distance Naruto travel is even larger than the distance the Raikage Traveled. Also note that Naruto is hunched to his left, meaning that he moved in a half circle fashion. This tacks on even more distance as he traveled more ground than a linear path would suggest.
The last and final layer we add onto this feat is actually really simple. The Raikage was already moving at full speed while Naruto wasn't. Naruto's feat included Accelaeration and deceleraion, meaning he wasn't moving at full speed for the entire movement.
In conclusion; Naruto moved a much farther distanced in less time while accelerating and decelerating. Bee cements this even further since he was able to keep up with V2 A, yet RM Naruto's Shunshin completely escaped his vision (Pre training at that).
To finish off our little equation.
BM Naruto (Shunshin) > RM Naruto (Shunshin) >>> V2 Raikage (Shunshin) > RM Naruto (unenhanced) = V1 A (Shunshin) > Itachi (Shunshin) = Sasuke (Shunshin) > V1 A (unenhanced) = Sasuke (Unenhanced)
Naruto's speed has reached a level where no one in the manga would he able mentally register him moving. Kishi has even had to put The Villians in scenarios where Naruto's speed wasn't an option so they wouldn't be one shot material; such as Naruto and Obito fighting amongst debris only to rely in the Kamui tactic once it cleared up. Or Madara and Naruto going start for an AoE battle.
Kishi knew he phucked up once he gave Naruto perfect control of his speed after training when Naruto was already an experienced Martial Artist (Gama Kata)