Itachi has higher COMBAT speed than the Raikage, of course in a race the Raikage would win, but in a fight, Itachi is as fast as Naruto KM.
By the young age of 9 , Itachi was physically superior to a Shinobi who could move at the speed of lightning:
His Seal Forming speed is so quick, that not even Sharingan Users can see that he performed any Hand Seals at all:
Managed to perform two Jutsu at the same time, an Exploding Shadow Clone and a Suiton Attack in such speed that a Team of Jonin, one of them having significant mastery of the Sharingan, couldn’t even start to follow his sign-weaving.
Likewise, when engaging with Sasuke in their Shuriken-Jutsu fight, he managed to perform the Signs for a Shadow Clone without Sasuke noticing even in the slightest, despite his incredible skill with the Sharingan.
Despite Sasuke using Lightning Flash Blade : Creation for increased Throwing Speed, Itachi matched him blow for blow, all the while managing to evoke a Shadow Clone at the same time, unbeknownst to Sasuke.
After being drained by using Tsukuyomi, he manages to avoid a Chidori from Sasuke mid-air, with seemingly no trouble at all.
Tenha em mente que a velocidade de Sasuke aumenta quando ele usa o Chidori, e é por isso que um Sharingan é necessário para realizar o Jutsu com segurança.
Isso é impressionante, considerando que Itachi estava quase morto e cego naquele momento, e que um Sasuke mais lento do que aquele que Itachi lutou foi capaz de desviar do Lariat de Killer Bee no ar.
As to why Taka Sasuke was slower than Hebi Sasuke, (And all around Physically Inferior) he had lost the Curse Mark and was still injured from his fight against Itachi.
As an Edo Tensei, Itachi was perfectly fine throwing hands with KCM1 Naruto and Killer Bee (Both of whom were either relative to or faster than Ay) at the same time, dodging and parrying their attacks with just his base Sharingan, with no one being able to land a strike on him.
Later on, he appears behind Killer Bee without him noticing, then proceeds to dodge his attack point-blank and initiate his own, as well as cast a Genjutsu at the same time.
While being blinded and immobilized by Kabuto’s Jutsu, he was able to intercept a Blitz attack from him using his Susano’o.
Here, Itachi evoked a Crow Clone, laid the foundations for the Izanami, substituted the Clone with himself and then cut off one of Kabuto’s Horns, with him being unable to react even with Sage Mode’s Precognition.
Furthermore, Sasuke, despite having the EMS which grants massively better Visual Prowess than the standard MS, again was unable to follow Itachi’s Hand Seal Speed, looking worried when Kabuto stabbed the Clone.
Blocks a Blitz Attempt by Kabuto, and covers the same distance as him, despite Kabuto starting running before him.
Manages to out-react EMS Sasuke, protecting him with his Susano’o before Sasuke even evoked his own.
Respect the Solo King