The Story of Mr. Rowan The Story of Mr. Rowan

it's normally incorrect to put someone's first name after 'Mr', so it should be Mr. Atkinson

The Story of Mr. RowaAtkinson The Story of Mr. Atkinson

as someone mentioned, Mr. should be followed by the surname, Mr. (first name) may only be used in informal situations

The Story of Mr. Rowan Atkinson The Story of Rowan Atkinson

"Mr. " is used with surnames, but it's honestly a bit overly formal in English here - it's more natural to use someone's full name these days

HiRowan's childhood love for machines never died, turning Rowan intoand he became an extreme car lover. Rowan's childhood love for machines never died, and he became an extreme car lover.

At the start of a story it's best to put the name first instead of using 'he' before the reader knows who 'he' refers to Other variants: Rowan never grew out of his childhood love for machines, so he eventually became an extreme car lover. A childhood love for machines that never died eventually led Rowan into becoming (or: made/turned Rowan into) an extreme car lover.

HiRowan's childhood love for machines never died, turning Rowanhim into an extreme car lover. Rowan's childhood love for machines never died, turning him into an extreme car lover.

AndBut he does not just buy cars to keep them in a garage, he drives them very hard. But he does not just buy cars to keep them in a garage, he drives them very hard.

in formal writing, it's wrong to start a sentence with "and"

He drives them very hard.(combined with previous) (combined with previous)

In real life, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars. In real life, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars.

In real life, hfact, he once owned one of the fastest and most expensive sports cars in human history, costing millions of dollars. In fact, he once owned one of the fastest and most expensive sports cars in human history, costing millions of dollars.

'In real life'--this means something like 'in the real world' as opposed to the fictional or virtual world. (If this is what you meant, disregard this correction)

In real lifeActually, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars. Actually, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars.

From the title and introduction, it's already clear you are talking about Rowan Atkinson the person, not Mr. Bean the character, therefore it's not necessary to specify "in real life"

In real life, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars. In real life, he owned one of the fastest and most expensive sports cars in human history, costing millions of dollars.

The space after a comma is needed in English

IBut instead of keeping it safe, he drove it so fast that he crashed it twice. But instead of keeping it safe, he drove it so fast that he crashed it twice.

One time, he hit a tree, the car caught on fire, and he hurt his shoulder. One time, he hit a tree, the car caught on fire, and he hurt his shoulder.

One time, he hit a tree, t. The car caught on fire, and he hurt his shoulder. One time, he hit a tree. The car caught on fire, and he hurt his shoulder.

One time, he hit a tree, the car caught on fire, and he hurt his shoulder. One time, he hit a tree, the car caught on fire, and he hurt his shoulder.

One time, he hit a tree, the car caught on fire, and he hurt his shoulder. One time, he hit a tree, the car caught on fire, and he hurt his shoulder.

But his most amazing real-life moment did not happen in a car; it happened ion an air plane. But his most amazing moment did not happen in a car; it happened on a plane.

It's more natural to simply say "plane" instead of "airplane"

He was flying in a small private airplane with his family. He was flying in a small private plane with his family.

His head dropped, and his body went limp. His head dropped and his body went limp.

The airplane started to drop. The plane started to drop.

Rowan Atkinson had never flown an air plane in his life. Rowan Atkinson had never flown a plane in his life.

Rowan Atkinson had never flown an airplane in his life. Rowan had never flown an airplane in his life.

Usually the full name is used in the title and introduction, and then just the first name from there, unless there were two Rowans in your story.

In a moments of extreme terror, people show who they really are. In moments of extreme terror, people show who they really are.

To make it more general

In a moments of extreme terror, people show who they really are. In moments of extreme terror, people show who they really are.

In a moments of extreme terror, people show who they really aretheir true colours. In moments of extreme terror, people show their true colours.

"to show one's true colours" is an expression that has the same meaning as "to show who one truly is"

HeRowan saved his family, and saved the plane. Rowan saved his family, and saved the plane.

Because you were talking about the pilot in the previous sentence, here it's necessary to specify that it's Rowan that saved the plane, or else it could be read as the pilot saving everyone.