The 80° V6 TAG engine had been financed by Mansour Ojjeh of Techniques d'Avant Garde (TAG) and was built by Porsche to Barnard's specification for the &lt;a href="McLaren%20MP4/1"&gt;MP4/1E&lt;/a&gt; and its highly successful replacement the &lt;a href="McLaren%20MP4/2"&gt;MP4/2&lt;/a&gt;. After debuting in Lauda's new MP4/1E at the 1983 Dutch Grand Prix with approximately , power steadily rose until the 1.5-litre turbocharged engine named the TTE PO1 produced around at the end of its life in .