Packard-Bentley

{{Infobox automobile

| image = Packard Bentley.jpg

| name = Packard-Bentley Special

| production = 2010

| assembly = Cholmondeley, Cheshire

| body_style = Single-seater (Monoposto)

| layout = FR layout

| platform = Bentley 8 Litre

| engine = {{convert|2540.11|cuin|cc L|abbr=on|2}} Packard 1A-2500 V12

| transmission = 3-speed manual

| wheelbase = {{convert|3556|mm}}

| weight = {{convert|2400|kg}}

| designer = Chris Williams

| related = Napier-Bentley
Napier-Railton
Bentley 8 Litre
Brutus (car)
The Beast
Meteor

| powerout = {{convert|1500|bhp|PS kW}}
{{convert|2000|lbft}}

| length = {{convert|7380|mm}}

| width = {{convert|2446|mm}}

| height = {{convert|2000|mm}}

| aka = Mavis

}}

The Packard-Bentley Mavis is a one-off racing car. It is powered by a {{convert|41.6|L|cid|abbr=on|lk=on}} Packard 4M-2500 V-12, developing {{convert|1500|bhp|kW|abbr=on|lk=on}} and ({{convert|2000|lbft|Nm|abbr=on|lk=on}}) of torque, sourced from an American World War II-era marine military PT boat.{{Cite news

|title=Packard V12 4M-2500 engine in detail

|journal=Daily Telegraph

|url=https://www.telegraph.co.uk/motoring/classiccars/8209523/Packard-V12-4M-2500-engine-in-detail.html

|date=20 December 2010

|author=Andrew English

}}

The car was built by Vintage Sports-Car Club member and Napier-Bentley owner Chris Williams,{{Cite news

|title=Christmas road test: Packard-engined Bentley

|url=https://www.telegraph.co.uk/motoring/classiccars/8194036/Christmas-road-test-Packard-engined-Bentley.html

|journal=Daily Telegraph

|date=20 December 2010

|author=Andrew English

}} and debuted at the Cholmondeley Pageant of Power in July 2010.

The Packard-Bentley is based on a 1930 Bentley 8-litre chassis, highly modified. The car also has 24 exhaust pipes, reflecting its engine's twin-port design. The steering column is offset and angled to allow it to clear the huge engine block.

The car is a very popular spectator attraction, both static and while being driven. As of 2019, it is now housed in Technik Museum Speyer, Germany, where it has previously featured in their "Brazzeltag" convention.