Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Entrant | Constructor | Chassis | Engine | Driver | Rounds |
| --- | --- | --- | --- | --- | --- |
| AFM | AFM - Küchen | AFM | Küchen 2.0 V8 | Hans Stuck | 1 |
| Toni Ulmen | Veritas | Meteor | Veritas 2.0 L6 | Toni Ulmen | 1, 6 |
| Equipe Gordini | Gordini | 16 16S 15 | Gordini 20 2.0 L6 Gordini 1500 1.5 L4 | Jean Behra | 1, 3–4, 6–8 |
| Equipe Gordini | Gordini | 16 16S 15 | Gordini 20 2.0 L6 Gordini 1500 1.5 L4 | Robert Manzon | 1, 3–8 |
| Equipe Gordini | Gordini | 16 16S 15 | Gordini 20 2.0 L6 Gordini 1500 1.5 L4 | B. Bira | 1, 3–5 |
| Equipe Gordini | Gordini | 16 16S 15 | Gordini 20 2.0 L6 Gordini 1500 1.5 L4 | Johnny Claes | 3 |
| Equipe Gordini | Gordini | 16 16S 15 | Gordini 20 2.0 L6 Gordini 1500 1.5 L4 | Maurice Trintignant | 4–8 |
| Ecurie Rosier | Ferrari | 500 | Ferrari 500 2.0 L4 | Louis Rosier | 1, 3–4, 8 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | George Abecassis | 1 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Peter Collins | 1, 3–6, 8 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Lance Macklin | 1, 3–5, 7–8 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Stirling Moss | 1 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Paul Frère | 3, 6 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Roger Laurent | 3 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Yves Giraud-Cabantous | 4 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Duncan Hamilton | 5, 7 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Johnny Claes | 6 |
| HW Motors | HWM - Alta | 52 51/52 | Alta F2 2.0 L4 | Dries van der Lof | 7 |
| Scuderia Franera | Frazer-Nash - Bristol | FN48 | Bristol BS1 2.0 L6 | Ken Wharton | 1, 3, 7–8 |
| Ecurie Richmond | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | Eric Brandon | 1, 3, 5, 8 |
| Ecurie Richmond | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | Alan Brown | 1, 3, 5, 8 |
| Scuderia Ferrari | Ferrari | 500 375S * | Ferrari 500 2.0 L4 Ferrari 375 4.5 V12 * | Giuseppe Farina | 1, 3–8 |
| Scuderia Ferrari | Ferrari | 500 375S * | Ferrari 500 2.0 L4 Ferrari 375 4.5 V12 * | Piero Taruffi | 1, 3–6, 8 |
| Scuderia Ferrari | Ferrari | 500 375S * | Ferrari 500 2.0 L4 Ferrari 375 4.5 V12 * | Andre Simon | 1, 8 |
| Scuderia Ferrari | Ferrari | 500 375S * | Ferrari 500 2.0 L4 Ferrari 375 4.5 V12 * | Alberto Ascari | 2–8 |
| Scuderia Ferrari | Ferrari | 500 375S * | Ferrari 500 2.0 L4 Ferrari 375 4.5 V12 * | Luigi Villoresi | 7–8 |
| Enrico Platé | Maserati - Platé | 4CLT/48 | Maserati Platé 2.0 L4 | Toulo de Graffenried | 1, 4–5, 8 |
| Enrico Platé | Maserati - Platé | 4CLT/48 | Maserati Platé 2.0 L4 | Harry Schell | 1, 4–5 |
| Enrico Platé | Maserati - Platé | 4CLT/48 | Maserati Platé 2.0 L4 | Alberto Crespo | 8 |
| Ecurie Espadon | Ferrari | 500 212 | Ferrari 500 2.0 L4 Ferrari 125 1.5 V12 | Rudi Fischer | 1, 4–6, 8 |
| Ecurie Espadon | Ferrari | 500 212 | Ferrari 500 2.0 L4 Ferrari 125 1.5 V12 | Peter Hirt | 1, 4–5 |
| Ecurie Espadon | Ferrari | 500 212 | Ferrari 500 2.0 L4 Ferrari 125 1.5 V12 | Rudolf Schoeller | 6 |
| Ecurie Espadon | Ferrari | 500 212 | Ferrari 500 2.0 L4 Ferrari 125 1.5 V12 | Hans Stuck | 8 |
| Alfred Dattner | Simca-Gordini | 11 | Gordini 1500 1.5 L4 | Max de Terra | 1 |
| Leslie D. Hawthorn | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | Mike Hawthorn | 3, 5, 7–8 |
| English Racing Automobiles Ltd | ERA - Bristol | G | Bristol BS1 2.0 L6 | Stirling Moss | 3, 5, 7 |
| Ecurie Francorchamps | Ferrari | 500 | Ferrari 500 2.0 L4 | Charles de Tornaco | 3, 7–8 |
| Ecurie Francorchamps | Ferrari | 500 | Ferrari 500 2.0 L4 | Roger Laurent | 6 |
| Arthur Legat | Veritas | Meteor | Veritas 2.0 L6 | Arthur Legat | 3 |
| Robin Montgomerie-Charrington | Aston-Butterworth | NB41 | Butterworth 2.0 F4 | Robin Montgomerie-Charrington | 3 |
| Tony Gaze | HWM - Alta | 52 | Alta F2 2.0 L4 | Tony Gaze | 3, 5–6, 8 |
| Robert O' Brien | Simca-Gordini | 15 | Gordini 1500 1.5 L4 | Robert O' Brien | 3 |
| Peter Whitehead | Alta Ferrari | F2 125/F2 | Alta F2 2.0 L4 Ferrari 125 1.5 V12 | Peter Whitehead | 4–5, 8 |
| Peter Whitehead | Alta Ferrari | F2 125/F2 | Alta F2 2.0 L4 Ferrari 125 1.5 V12 | Graham Whitehead | 5 |
| Escuderia Bandeirantes | Maserati | A6GCM | Maserati A6 2.0 L6 | Philippe Étancelin | 4 |
| Escuderia Bandeirantes | Maserati | A6GCM | Maserati A6 2.0 L6 | Gino Bianco | 5–8 |
| Escuderia Bandeirantes | Maserati | A6GCM | Maserati A6 2.0 L6 | Eitel Cantoni | 5–6, 8 |
| Escuderia Bandeirantes | Maserati | A6GCM | Maserati A6 2.0 L6 | Chico Landi | 7–8 |
| Escuderia Bandeirantes | Maserati | A6GCM | Maserati A6 2.0 L6 | Jan Flinterman | 7 |
| Ecurie Belge | Simca-Gordini | 15 | Gordini 1500 1.5 L4 | Johnny Claes | 4–5 |
| Ecurie Belge | Simca-Gordini | 15 | Gordini 1500 1.5 L4 | Paul Frère | 7 |
| Scuderia Marzotto | Ferrari | 166/F2 | Ferrari 125 1.5 V12 | Franco Comotti | 4 |
| Scuderia Marzotto | Ferrari | 166/F2 | Ferrari 125 1.5 V12 | Piero Carini | 4, 6 |
| Archie Bryde AHM Bryde | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | Mike Hawthorn | 4 |
| Archie Bryde AHM Bryde | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | Reg Parnell | 5 |
| W.S. Aston | Aston-Butterworth | NB41 | Butterworth 2.0 F4 | Bill Aston | 5–6, 8 |
| Connaught Engineering | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Kenneth McAlpine | 5, 8 |
| Connaught Engineering | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Ken Downing | 5 |
| Connaught Engineering | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Eric Thompson | 5 |
| Connaught Engineering | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Dennis Poore | 5, 8 |
| Connaught Engineering | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Stirling Moss | 8 |
| Ecurie Ecosse | Cooper - Bristol | T20 | Bristol BS1 2.0 L6 | David Murray | 5 |
| G. Caprara | Ferrari | 500 | Ferrari 500 2.0 L4 | Roy Salvadori | 5 |
| Tony Crook | Frazer-Nash - BMW | 421 | BMW 328 2.0 L6 | Tony Crook | 5 |
| Marcel Balsa | Balsa - BMW | Eigenbau | BMW 328 2.0 L6 | Marcel Balsa | 6 |
| Fritz Riess | Veritas | RS | Veritas 2.0 L6 | Fritz Riess | 6 |
| Theo Helfrich | Veritas | RS | Veritas 2.0 L6 | Theo Helfrich | 6 |
| Willi Heeks | AFM - BMW | 8 | BMW 328 2.0 L6 | Willi Heeks | 6 |
| Helmut Niedermayr | AFM - BMW | 6 | BMW 328 2.0 L6 | Helmut Niedermayr | 6 |
| Adolf Brudes | Veritas | RS | Veritas 2.0 L6 | Adolf Brudes | 6 |
| Motor Presse Verlag | Veritas | Meteor | Veritas 2.0 L6 | Paul Pietsch | 6 |
| Hans Klenk | Veritas | Meteor | Veritas 2.0 L6 | Hans Klenk | 6 |
| Josef Peters | Veritas | RS | Veritas 2.0 L6 | Josef Peters | 6 |
| Bernhard Nacke | Nacke - BMW | Eigenbau | BMW 328 2.0 L6 | Günther Bechem | 6 |
| Ludwig Fischer | AFM - BMW | 8 | BMW 328 2.0 L6 | Ludwig Fischer | 6 |
| Willi Krakau | AFM - BMW | 6 | BMW 328 2.0 L6 | Willi Krakau | 6 |
| Willi Krakau | Krakau - BMW | Eigenbau | BMW 328 2.0 L6 | Harry Merkel | 6 |
| Ernst Klodwig | Heck - BMW | Eigenbau | BMW 328 2.0 L6 | Ernst Klodwig | 6 |
| Rudolf Krause | Greifzu - BMW | Eigenbau | BMW 328 2.0 L6 | Rudolf Krause | 6 |
| Ken Downing | Connaught - Lea Francis | A | Lea Francis 2.0 L4 | Ken Downing | 7 |
| Officine Alfieri Maserati | Maserati | A6GCM | Maserati A6 2.0 L6 | Felice Bonetto | 8 |
| Officine Alfieri Maserati | Maserati | A6GCM | Maserati A6 2.0 L6 | Franco Rol | 8 |
| Officine Alfieri Maserati | Maserati | A6GCM | Maserati A6 2.0 L6 | José Froilán González | 8 |
| Élie Bayol | OSCA | 20 | OSCA 2000 2.0 L6 | Élie Bayol | 8 |
| Piero Dusio | Cisitalia - BPM | D46 | BPM 2.0 L4 | Piero Dusio | 8 |
| Vicomtesse de Walckiers | Simca-Gordini | 15 | Gordini 1500 1.5 L4 | Johnny Claes | 8 |
Question:
what was the engine when ken downing drove an entrant from connaught engineering?
Answer:
Lea Francis 2.0 L4