#logo {
background-size:contain;
background-image: url("https://tweedlove.com/wp-content/uploads/2021/12/Pirelli-GT7-22.png");
width:300px;
height:150px;
}

<div id="header_right">
    <div>
        <a href="https://www.sportident.co.uk" title="SiTiming from SPORTident" id="logo_header"><span>SiTiming from SPORTident</span></a>
        </div>
</div>